chore: bun workspace scaffold

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "jsx": "react-jsx",
+    "types": ["bun-types"],
+    "skipLibCheck": true,
+    "noEmit": true,
+    "allowImportingTsExtensions": true,
+    "baseUrl": ".",
+    "paths": { "@stc/*": ["packages/*/src"] }
+  },
+  "include": ["packages/*/src", "packages/*/test", "apps/*/src"]
+}