feat: add hooks example for Claude, Codex, and OpenCode

Demonstrates using the filesystem API to write agent hook configs
inside a Docker sandbox, then verifies they fire by prompting each
agent and reading back a shared log file.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

examples/hooks/tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM"],
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "allowImportingTsExtensions": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "**/*.test.ts"]
+}