perf: parallelize local check gate

tsconfig.extensions.json

@@ -1,5 +1,8 @@
 {
   "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "tsBuildInfoFile": ".artifacts/tsgo-cache/extensions.tsbuildinfo"
+  },
   "include": ["src/**/*.d.ts", "ui/src/**/*.d.ts", "extensions/**/*"],
   "exclude": ["node_modules", "dist", "**/dist/**", "**/*.test.ts", "**/*.test.tsx", "test/**"]
 }