Rename constants to descriptive names (refactor step 1)

Pure rename, no behavior change; the full suite (RNG goldens,
generation invariants, scripted sessions, save round trip) is
unchanged and green.

- Creature flags: IsHuh→Confused, IsHalu→Hallucinating,
  CanHuh→CanConfuse, CanSee→CanSeeInvisible, IsRun→Awake,
  SeeMonst→SenseMonsters, IsCanc→Cancelled, IsLevit→Levitating,
  IsBlind/IsGreed/IsHaste/IsTarget/IsHeld/IsInvis/IsMean/IsRegen/
  IsFly/IsSlow → Blind/Greedy/Hasted/Targeted/Held/Invisible/Mean/
  Regenerates/Flying/Slowed, IsFound→Found
- Object flags: IsCursed→Cursed, IsKnow→Known, IsMissl→Missile,
  IsMany→Stackable, ObjIsFound→WasFound, IsProt→Protected
- Room flags: IsDark/IsGone/IsMaze → Dark/Gone/Maze; place flags:
  FPass→FPassage, FPNum→FPassNum, FTMask→FTrapMask
- Trap types: TDoor→TrapDoor ... TMyst→TrapMystery
- Item subtypes: P*→Potion* (PLSD→PotionLSD, PMFind→
  PotionDetectMonsters, ...), S*→Scroll* (SIDRorS→
  ScrollIdentifyRingOrStick, ...), R*→Ring* (RAddHit→RingDexterity,
  RNop→RingAdornment, ...), Ws*→Wand* (WsElect→WandLightning, ...),
  weapons (TwoSword→WeaponTwoHandedSword, Shiraken→WeaponShuriken,
  ...), armor (RingMail→ArmorRingMail, ...)
- Counts: Max{Potions,Scrolls,Rings,Sticks,Weapons,Armors} →
  Num{Potion,Scroll,Ring,Wand,Weapon,Armor}Types; NTraps→NumTrapTypes
- Level.NTraps field → TrapCount (also in the save snapshot)
- Original C constant names preserved as comment breadcrumbs in
  types.go so the lineage stays greppable

TODO.md: step 1 moved to Completed, step 2 (typed kinds) promoted to
Next Step.

game/sticks.go

@@ -21,13 +21,13 @@ func (g *RogueGame) doZap() {
 		return
 	}
 	switch obj.Which {
-	case WsLight:
+	case WandLight:
 		// Reddy Kilowatt wand.  Light up the room
-		g.Items.Sticks[WsLight].Know = true
-		if p.Room.Flags.Has(IsGone) {
+		g.Items.Sticks[WandLight].Know = true
+		if p.Room.Flags.Has(Gone) {
 			g.msg("the corridor glows and then fades")
 		} else {
-			p.Room.Flags.Clear(IsDark)
+			p.Room.Flags.Clear(Dark)
 			// Light the room and put the player back up
 			g.enterRoom(p.Pos)
 			g.addmsg("the room is lit")
@@ -36,7 +36,7 @@ func (g *RogueGame) doZap() {
 			}
 			g.endmsg()
 		}
-	case WsDrain:
+	case WandDrainLife:
 		// take away 1/2 of hero's hit points, then take it away evenly
 		// from the monsters in the room (or next to hero if he is in a
 		// passage)
@@ -45,7 +45,7 @@ func (g *RogueGame) doZap() {
 			return
 		}
 		g.drain()
-	case WsInvis, WsPolymorph, WsTelAway, WsTelTo, WsCancel:
+	case WandInvisibility, WandPolymorph, WandTeleportAway, WandTeleportTo, WandCancellation:
 		y := p.Pos.Y
 		x := p.Pos.X
 		for stepOk(g.Level.VisibleChar(y, x)) {
@@ -55,15 +55,15 @@ func (g *RogueGame) doZap() {
 		if tp := g.Level.MonsterAt(y, x); tp != nil {
 			monster := tp.Type
 			if monster == 'F' {
-				p.Flags.Clear(IsHeld)
+				p.Flags.Clear(Held)
 			}
 			switch obj.Which {
-			case WsInvis:
-				tp.Flags.Set(IsInvis)
+			case WandInvisibility:
+				tp.Flags.Set(Invisible)
 				if g.cansee(y, x) {
 					g.mvaddch(y, x, tp.OldCh)
 				}
-			case WsPolymorph:
+			case WandPolymorph:
 				pp := tp.Pack
 				detachMon(&g.Level.Monsters, tp)
 				if g.seeMonst(tp) {
@@ -80,18 +80,18 @@ func (g *RogueGame) doZap() {
 				tp.OldCh = oldch
 				tp.Pack = pp
 				if g.seeMonst(tp) {
-					g.Items.Sticks[WsPolymorph].Know = true
+					g.Items.Sticks[WandPolymorph].Know = true
 				}
-			case WsCancel:
-				tp.Flags.Set(IsCanc)
-				tp.Flags.Clear(IsInvis | CanHuh)
+			case WandCancellation:
+				tp.Flags.Set(Cancelled)
+				tp.Flags.Clear(Invisible | CanConfuse)
 				tp.Disguise = tp.Type
 				if g.seeMonst(tp) {
 					g.mvaddch(y, x, tp.Disguise)
 				}
-			case WsTelAway, WsTelTo:
+			case WandTeleportAway, WandTeleportTo:
 				var newPos Coord
-				if obj.Which == WsTelAway {
+				if obj.Which == WandTeleportAway {
 					for {
 						newPos, _ = g.findFloor(nil, 0, true)
 						if newPos != p.Pos {
@@ -103,18 +103,18 @@ func (g *RogueGame) doZap() {
 					newPos.X = p.Pos.X + g.Delta.X
 				}
 				tp.Dest = &p.Pos
-				tp.Flags.Set(IsRun)
+				tp.Flags.Set(Awake)
 				g.relocate(tp, newPos)
 			}
 		}
-	case WsMissile:
-		g.Items.Sticks[WsMissile].Know = true
+	case WandMagicMissile:
+		g.Items.Sticks[WandMagicMissile].Know = true
 		bolt := newObject()
 		bolt.Type = '*'
 		bolt.HurlDmg = "1x4"
 		bolt.HPlus = 100
 		bolt.DPlus = 1
-		bolt.Flags = IsMissl
+		bolt.Flags = Missile
 		if p.CurWeapon != nil {
 			bolt.Launch = p.CurWeapon.Which
 		}
@@ -127,7 +127,7 @@ func (g *RogueGame) doZap() {
 		} else {
 			g.msg("the missle vanishes with a puff of smoke")
 		}
-	case WsHasteM, WsSlowM:
+	case WandHasteMonster, WandSlowMonster:
 		y := p.Pos.Y
 		x := p.Pos.X
 		for stepOk(g.Level.VisibleChar(y, x)) {
@@ -135,17 +135,17 @@ func (g *RogueGame) doZap() {
 			x += g.Delta.X
 		}
 		if tp := g.Level.MonsterAt(y, x); tp != nil {
-			if obj.Which == WsHasteM {
-				if tp.On(IsSlow) {
-					tp.Flags.Clear(IsSlow)
+			if obj.Which == WandHasteMonster {
+				if tp.On(Slowed) {
+					tp.Flags.Clear(Slowed)
 				} else {
-					tp.Flags.Set(IsHaste)
+					tp.Flags.Set(Hasted)
 				}
 			} else {
-				if tp.On(IsHaste) {
-					tp.Flags.Clear(IsHaste)
+				if tp.On(Hasted) {
+					tp.Flags.Clear(Hasted)
 				} else {
-					tp.Flags.Set(IsSlow)
+					tp.Flags.Set(Slowed)
 				}
 				tp.Turn = true
 			}
@@ -153,19 +153,19 @@ func (g *RogueGame) doZap() {
 			g.Delta.X = x
 			g.runto(g.Delta)
 		}
-	case WsElect, WsFire, WsCold:
+	case WandLightning, WandFire, WandCold:
 		var name string
 		switch obj.Which {
-		case WsElect:
+		case WandLightning:
 			name = "bolt"
-		case WsFire:
+		case WandFire:
 			name = "flame"
 		default:
 			name = "ice"
 		}
 		g.fireBolt(p.Pos, &g.Delta, name)
 		g.Items.Sticks[obj.Which].Know = true
-	case WsNop:
+	case WandNothing:
 	}
 	obj.SetCharges(obj.Charges() - 1)
 }
@@ -176,14 +176,14 @@ func (g *RogueGame) drain() {
 	// First count how many things we need to spread the hit points among
 	var corp *Room
 	if g.Level.Char(p.Pos.Y, p.Pos.X) == Door {
-		corp = &g.Level.Passages[*g.Level.FlagsAt(p.Pos.Y, p.Pos.X)&FPNum]
+		corp = &g.Level.Passages[*g.Level.FlagsAt(p.Pos.Y, p.Pos.X)&FPassNum]
 	}
-	inpass := p.Room.Flags.Has(IsGone)
+	inpass := p.Room.Flags.Has(Gone)
 	var drainee []*Monster
 	for _, mp := range g.Level.Monsters {
 		if mp.Room == p.Room || mp.Room == corp ||
 			(inpass && g.Level.Char(mp.Pos.Y, mp.Pos.X) == Door &&
-				&g.Level.Passages[*g.Level.FlagsAt(mp.Pos.Y, mp.Pos.X)&FPNum] == p.Room) {
+				&g.Level.Passages[*g.Level.FlagsAt(mp.Pos.Y, mp.Pos.X)&FPassNum] == p.Room) {
 			drainee = append(drainee, mp)
 		}
 	}
@@ -212,11 +212,11 @@ func (g *RogueGame) fireBolt(start Coord, dir *Coord, name string) {
 
 	bolt := newObject()
 	bolt.Type = Weapon
-	bolt.Which = Flame
+	bolt.Which = WeaponFlame
 	bolt.HurlDmg = "6x6"
 	bolt.HPlus = 100
 	bolt.DPlus = 0
-	g.Items.Weapons[Flame].Name = name
+	g.Items.Weapons[WeaponFlame].Name = name
 	var dirch byte
 	switch dir.Y + dir.X {
 	case 0:
@@ -329,7 +329,7 @@ func (g *RogueGame) fixStick(cur *Object) {
 	cur.HurlDmg = "1x1"
 
 	switch cur.Which {
-	case WsLight:
+	case WandLight:
 		cur.SetCharges(g.rnd(10) + 10)
 	default:
 		cur.SetCharges(g.rnd(5) + 3)
@@ -339,7 +339,7 @@ func (g *RogueGame) fixStick(cur *Object) {
 // chargeStr returns the charge-count suffix for an identified stick
 // (sticks.c charge_str).
 func chargeStr(g *RogueGame, obj *Object) string {
-	if !obj.Flags.Has(IsKnow) {
+	if !obj.Flags.Has(Known) {
 		return ""
 	}
 	if g.Options.Terse {