Initial public release of PSX Adventure Engine

Browser reference stack for PSX-era third-person adventure: fixed cameras,
inventory puzzles, Box3D physics, host-authoritative P2P co-op, and a modular
character harness. Ships the Ashgrove Precinct Level 1 investigation demo with
a full cast and nine linked rooms.

.gitignore

@@ -0,0 +1,50 @@
+# Dependencies
+node_modules
+
+# Build output
+dist
+dist-ssr
+.turbo
+*.local
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+# Environment / secrets (never commit)
+.env
+.env.*
+!.env.example
+
+# Editor / OS
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+*~
+
+# Local agent / IDE scratch
+.claude
+.grok
+.cursor
+
+# Generated / cache (rebuild with tools)
+assets/generated
+assets/characters/.grok-texture-cache
+**/.grok-texture-cache/
+*.analysis.json
+
+# Temp scratch
+*.tmp.ts
+*.tmp.js
+/tmp/