Initialize Harmness Browser JetBrains plugin skeleton

- Gradle + Kotlin + IntelliJ Platform SDK build
- JCEF embedded browser tool window with configurable start URL
- Settings page (Tools > Harmness Browser)
- JS<->Java bridge scaffold (window.harmnessBridge)
- Vite + React + TypeScript web scaffold for embedded page
- README: build, register, upload to Marketplace, install guide

web/tsconfig.json

@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "strict": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noFallthroughCasesInSwitch": true,
+    "forceConsistentCasingInFileNames": true,
+    "outDir": "dist"
+  },
+  "include": ["src"]
+}