refactor: rename project to LedGrab, split HA integration into separate repo

- Rename Python package: wled_controller -> ledgrab
- Rename env var prefix: WLED_ -> LEDGRAB_ (with auto-migration for old vars)
- Rename localStorage key: wled_api_key -> ledgrab_api_key (with migration)
- Rename HA integration domain: wled_screen_controller -> ledgrab
- Update all imports, build scripts, Docker, installer, config, docs
- Remove HA integration (moved to ledgrab-haos-integration repo)
- Remove hacs.json (belongs in HA repo now)
- Add startup warning for users with old WLED_ env vars
- All tests pass (715/715), ruff clean, tsc clean, frontend builds

server/tsconfig.json

@@ -12,9 +12,9 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "lib": ["ES2020", "DOM", "DOM.Iterable"],
-    "baseUrl": "src/wled_controller/static",
-    "rootDir": "src/wled_controller/static"
+    "baseUrl": "src/ledgrab/static",
+    "rootDir": "src/ledgrab/static"
   },
-  "include": ["src/wled_controller/static/js/**/*.ts"],
-  "exclude": ["node_modules", "src/wled_controller/static/dist"]
+  "include": ["src/ledgrab/static/js/**/*.ts"],
+  "exclude": ["node_modules", "src/ledgrab/static/dist"]
 }