chore: add TypeScript, Prettier and changelog scaffold

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

tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "declaration": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "types": ["node"],
+    "skipLibCheck": true
+  },
+  "include": ["src"]
+}