test: add Window type augmentation and standardize window access

- Add browser_tests/types/globals.d.ts with Window interface augmentation

- Add types for app, graph, LiteGraph, LGraphBadge and test globals

- Standardize window['prop'] to window.prop across 37 test files

- Update browser_tests/tsconfig.json to include new type definitions

Amp-Thread-ID: https://ampcode.com/threads/T-019c16b3-cc31-70ea-9727-a933cb0ee942
Co-authored-by: Amp <amp@ampcode.com>

browser_tests/tsconfig.json

@@ -7,5 +7,10 @@
     "noUnusedParameters": true,
     "resolveJsonModule": true
   },
-  "include": ["**/*.ts", "../src/types/**/*.d.ts", "../global.d.ts"]
+  "include": [
+    "**/*.ts",
+    "../src/types/**/*.d.ts",
+    "../global.d.ts",
+    "types/**/*.d.ts"
+  ]
 }