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.

MEMORY.md

@@ -20,7 +20,10 @@ The .golangci.yml is the house standard and may only be modified with
 sneak's explicit permission. To disable a linter, ask, explaining what
 the linter does; he approves specific exceptions, which are recorded
 in the config's "Repo-specific exceptions" block with the approval
-date. Approved so far: paralleltest (2026-07-06). Line-level //nolint
+date. Approved so far: paralleltest (2026-07-06); testpackage and
+exhaustive (2026-07-07). Complexity linters (cyclop, gocognit, nestif)
+stay enabled and red until refactor step 7 fixes the findings, per
+sneak 2026-07-07. mnd findings await a ruling. Line-level //nolint
 with a reason is used sparingly for C-faithfulness (e.g. the authentic
 "missle" message spellings) and provably-safe gosec conversions; each
 needs a justifying comment.