build: modernize TypeScript config for ES modules

- Change module from CommonJS to ESNext
- Remove esModuleInterop and allowSyntheticDefaultImports
- Simplify configuration for pure ES module support

Author: Mearman

tsconfig.json

@@ -1,19 +1,17 @@
 {
   "compilerOptions": {
     "target": "ES2022",
-    "module": "CommonJS",
+    "module": "ESNext",
     "outDir": "./dist",
     "rootDir": "./src",
     "strict": true,
-    "esModuleInterop": true,
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
     "declaration": true,
     "declarationMap": true,
     "sourceMap": true,
     "resolveJsonModule": true,
     "moduleResolution": "node",
-    "allowSyntheticDefaultImports": true,
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
     "noImplicitAny": true,