refactor(games): organize folder

[d1rshan]

• organize folder with new core/
• cleanup imports

[greptile-apps]

Greptile Summary

This PR reorganizes shared game infrastructure into a new core/ subdirectory under features/games/, and updates all import paths throughout the codebase accordingly. No logic changes are introduced.

• Shared files (types.ts, utils.ts, hooks.ts, metrics.ts, components/, registry.ts) are moved from features/games/ to features/games/core/.
• All consumers — including app.tsx, page components, commandline registry, and per-game modules — are updated to point at the new core/ paths; a grep confirms no stale @/features/games/(registry|types|hooks|metrics|utils|components) references remain.
• Within the games feature itself, cross-module imports consistently use relative paths (e.g., ../core/types); external consumers use the @/ alias.

Confidence Score: 5/5

Pure folder reorganization with no logic changes; all import paths verified to be fully updated.

Every moved file has its imports updated, no stale references to the old paths remain anywhere in the codebase, and the new relative import style within the games feature is applied consistently. The deleted top-level registry.ts is fully replaced by the new core/registry.ts with identical exports.

No files require special attention.

Important Files Changed

Filename	Overview
apps/frontend/src/features/games/core/registry.ts	New registry file in core/ with relative imports from falling-words and survival index files; functionally identical to the deleted registry.ts
apps/frontend/src/features/games/registry.ts	Old top-level registry.ts deleted; superseded by core/registry.ts
apps/frontend/src/features/games/survival/view.tsx	All core imports updated to ../core/ relative paths; no logic changes
apps/frontend/src/features/games/falling-words/view.tsx	Imports from components/ and types updated to ../core/; no logic changes
apps/frontend/src/app/app.tsx	Updated three imports from @/features/games/* to @/features/games/core/*
apps/frontend/src/features/commandline/registry.ts	Three import paths updated to core/; no logic changes

_{Reviews (1): Last reviewed commit: "fix import" | Re-trigger Greptile}