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/daemons.go

@@ -53,10 +53,10 @@ func (g *RogueGame) doctor(int) {
 	} else if g.Quiet >= 3 {
 		p.Stats.HP += g.rnd(lv-7) + 1
 	}
-	if p.IsRing(Left, RRegen) {
+	if p.IsRing(Left, RingRegeneration) {
 		p.Stats.HP++
 	}
-	if p.IsRing(Right, RRegen) {
+	if p.IsRing(Right, RingRegeneration) {
 		p.Stats.HP++
 	}
 	if ohp != p.Stats.HP {
@@ -92,27 +92,27 @@ func wanderTime(g *RogueGame) int { return g.spread(70) }
 // unconfuse releases the poor player from his confusion (daemons.c
 // unconfuse).
 func (g *RogueGame) unconfuse(int) {
-	g.Player.Flags.Clear(IsHuh)
+	g.Player.Flags.Clear(Confused)
 	g.msg("you feel less %s now", g.chooseStr("trippy", "confused"))
 }
 
 // unsee turns off the ability to see invisible (daemons.c unsee).
 func (g *RogueGame) unsee(int) {
 	for _, th := range g.Level.Monsters {
-		if th.On(IsInvis) && g.seeMonst(th) {
+		if th.On(Invisible) && g.seeMonst(th) {
 			g.mvaddch(th.Pos.Y, th.Pos.X, th.OldCh)
 		}
 	}
-	g.Player.Flags.Clear(CanSee)
+	g.Player.Flags.Clear(CanSeeInvisible)
 }
 
 // sight gives the hero his sight back (daemons.c sight).
 func (g *RogueGame) sight(int) {
 	p := &g.Player
-	if p.On(IsBlind) {
+	if p.On(Blind) {
 		g.Extinguish(DSight)
-		p.Flags.Clear(IsBlind)
-		if !p.Room.Flags.Has(IsGone) {
+		p.Flags.Clear(Blind)
+		if !p.Room.Flags.Has(Gone) {
 			g.enterRoom(p.Pos)
 		}
 		g.msg("%s", g.chooseStr("far out!  Everything is all cosmic again",
@@ -122,7 +122,7 @@ func (g *RogueGame) sight(int) {
 
 // nohaste ends the hasting (daemons.c nohaste).
 func (g *RogueGame) nohaste(int) {
-	g.Player.Flags.Clear(IsHaste)
+	g.Player.Flags.Clear(Hasted)
 	g.msg("you feel yourself slowing down")
 }
 
@@ -170,7 +170,7 @@ func (g *RogueGame) stomach(int) {
 		}
 	}
 	if p.HungryState != origHungry {
-		p.Flags.Clear(IsRun)
+		p.Flags.Clear(Awake)
 		g.Running = false
 		g.ToDeath = false
 		g.Count = 0
@@ -180,14 +180,14 @@ func (g *RogueGame) stomach(int) {
 // comeDown takes the hero down off her acid trip (daemons.c come_down).
 func (g *RogueGame) comeDown(int) {
 	p := &g.Player
-	if !p.On(IsHalu) {
+	if !p.On(Hallucinating) {
 		return
 	}
 
 	g.KillDaemon(DVisuals)
-	p.Flags.Clear(IsHalu)
+	p.Flags.Clear(Hallucinating)
 
-	if p.On(IsBlind) {
+	if p.On(Blind) {
 		return
 	}
 
@@ -199,11 +199,11 @@ func (g *RogueGame) comeDown(int) {
 	}
 
 	// undo the monsters
-	seemonst := p.On(SeeMonst)
+	seemonst := p.On(SenseMonsters)
 	for _, tp := range g.Level.Monsters {
 		g.move(tp.Pos.Y, tp.Pos.X)
 		if g.cansee(tp.Pos.Y, tp.Pos.X) {
-			if !tp.On(IsInvis) || p.On(CanSee) {
+			if !tp.On(Invisible) || p.On(CanSeeInvisible) {
 				g.addch(tp.Disguise)
 			} else {
 				g.addch(g.Level.Char(tp.Pos.Y, tp.Pos.X))
@@ -237,7 +237,7 @@ func (g *RogueGame) visuals(int) {
 	}
 
 	// change the monsters
-	seemonst := p.On(SeeMonst)
+	seemonst := p.On(SenseMonsters)
 	for _, tp := range g.Level.Monsters {
 		g.move(tp.Pos.Y, tp.Pos.X)
 		if g.seeMonst(tp) {
@@ -256,7 +256,7 @@ func (g *RogueGame) visuals(int) {
 
 // land lands the hero from a levitation potion (daemons.c land).
 func (g *RogueGame) land(int) {
-	g.Player.Flags.Clear(IsLevit)
+	g.Player.Flags.Clear(Levitating)
 	g.msg("%s", g.chooseStr("bummer!  You've hit the ground",
 		"you float gently to the ground"))
 }