Move all package-level vars into gameData; finish lint adoption

gochecknoglobals: all 37 package-level tables consolidated into the
gameData struct (game/tables.go), built by newGameData() and carried
on RogueGame as g.data (set in NewGame and Restore). ObjectKind
Glyph()/objectKindForGlyph are now switches; the table-reading subtype
Stringer methods are gone; isMagic is a RogueGame method.

goconst: repeated words named (potionName/scrollName/ringName/goldName
in object.go, wandName/staffName in sticks.go, ripWall in tables.go).

exhaustive, testpackage: disabled in .golangci.yml with sneak's
approval (2026-07-07).

Also reverts misspell's silent corruption of the "ther" scroll-name
syllable (it had become "there", changing generated scroll names vs C).

Remaining red: cyclop/gocognit/nestif until refactor step 7; mnd
awaits a ruling. TODO.md rotated; MEMORY.md lint notes updated.

game/sticks.go

@@ -4,6 +4,12 @@ import "fmt"
 
 // sticks.c — zap wands and staffs.
 
+// The two ws_type strings a stick can be made as.
+const (
+	wandName  = "wand"
+	staffName = "staff"
+)
+
 // doZap performs a zap with a wand (sticks.c do_zap).
 func (g *RogueGame) doZap() {
 	p := &g.Player
@@ -378,7 +384,7 @@ func (g *RogueGame) fireBolt(start Coord, dir *Coord, name string) {
 
 // fixStick sets up a new wand or staff (sticks.c fix_stick).
 func (g *RogueGame) fixStick(cur *Object) {
-	if g.Items.WandType[cur.Which] == "staff" {
+	if g.Items.WandType[cur.Which] == staffName {
 		cur.Damage = dice("2x3")
 	} else {
 		cur.Damage = dice("1x1")