feat: add tsconfig.json - root TypeScript configuration for monorepo

TypeScript configuration with:
- Modern ES2022 target with strict type checking
- Monorepo-optimized project references
- Path mapping for clean imports across packages
- Comprehensive compiler options for production builds
- Support for incremental compilation
- ESM modules with bundler resolution
- Development and build optimizations
- Workspace-aware include/exclude patterns

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,112 @@
+{
+  "compilerOptions": {
+    // Language and Environment
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowJs": true,
+    "checkJs": false,
+
+    // Bundler mode
+    "allowImportingTsExtensions": false,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": false,
+
+    // Type Checking
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "exactOptionalPropertyTypes": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+    "allowUnusedLabels": false,
+    "allowUnreachableCode": false,
+
+    // Modules
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+
+    // Emit
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "outDir": "./dist",
+    "removeComments": false,
+    "importHelpers": true,
+
+    // Interop Constraints
+    "verbatimModuleSyntax": false,
+
+    // JavaScript Support
+    "allowJs": true,
+    "checkJs": false,
+
+    // Editor Support
+    "plugins": [
+      {
+        "name": "typescript-plugin-css-modules"
+      }
+    ],
+
+    // Path Mapping
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["./src/*"],
+      "@api/*": ["./packages/api/src/*"],
+      "@worker/*": ["./packages/worker/src/*"],
+      "@frontend/*": ["./packages/frontend/src/*"],
+      "@shared/*": ["./packages/shared/src/*"],
+      "@types/*": ["./types/*"],
+      "@utils/*": ["./packages/shared/src/utils/*"],
+      "@config/*": ["./packages/shared/src/config/*"]
+    },
+
+    // Advanced
+    "skipLibCheck": true,
+    "incremental": true,
+    "tsBuildInfoFile": "./dist/.tsbuildinfo"
+  },
+  "include": [
+    "packages/**/*",
+    "types/**/*",
+    "*.ts",
+    "*.js"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist",
+    "build",
+    "coverage",
+    "**/*.spec.ts",
+    "**/*.test.ts",
+    "**/*.stories.ts",
+    "**/*.stories.tsx"
+  ],
+  "references": [
+    {
+      "path": "./packages/api"
+    },
+    {
+      "path": "./packages/worker"
+    },
+    {
+      "path": "./packages/frontend"
+    },
+    {
+      "path": "./packages/shared"
+    }
+  ],
+  "ts-node": {
+    "esm": true,
+    "experimentalSpecifierResolution": "node",
+    "compilerOptions": {
+      "module": "ESNext",
+      "moduleResolution": "node"
+    }
+  }
+}