fix: ensure workspace dependencies are installed via bun workspaces

Add "website" and "docs" to bun workspaces in root package.json and remove
pnpm packageManager field from website/package.json to fix bun run build:site.

package.json

@@ -1,7 +1,7 @@
 {
     "name": "hapi",
     "private": true,
-    "workspaces": ["cli", "server", "web"],
+    "workspaces": ["cli", "server", "web", "website", "docs"],
     "scripts": {
         "build:site": "bun run --cwd website build && bun run --cwd docs docs:build && cp -r docs/.vitepress/dist website/dist/public/docs",
         "dev": "concurrently \"bun run dev:server\" \"bun run dev:web\" --kill-others-on-exit",

website/package.json

@@ -92,8 +92,7 @@
     "vite-plugin-manus-runtime": "^0.0.57",
     "vitest": "^2.1.4"
   },
-  "packageManager": "pnpm@10.4.1+sha512.c753b6c3ad7afa13af388fa6d808035a008e30ea9993f58c6663e2bc5ff21679aa834db094987129aa4d488b86df57f7b634981b2f827cdcacc698cc0cfb88af",
-  "overrides": {
+    "overrides": {
     "tailwindcss>nanoid": "3.3.7"
   }
 }