feat: refactor docs implementation to use deno vercel microservice instead of subprocess

Author: devdumpling

PLAN_MICRO.md

@@ -0,0 +1,56 @@
+# docs-api
+
+A Deno-based microservice for generating API documentation from npm packages.
+
+## Overview
+
+This service uses `@deno/doc` to generate documentation nodes from npm package types via esm.sh. It's designed to run on Vercel using the `vercel-deno` community runtime.
+
+## Deployment
+
+1. Deploy as a separate Vercel project
+2. Configure custom domain (e.g., `docs-api.npmx.dev`)
+3. Optionally set `API_SECRET` environment variable for authentication
+
+## API
+
+### POST /api/generate
+
+Generate documentation for an npm package.
+
+**Request:**
+
+```json
+{
+  "package": "ufo",
+  "version": "1.5.0"
+}
+```
+
+**Response (success):**
+
+```json
+{
+  "nodes": [...]
+}
+```
+
+**Response (error):**
+
+```json
+{
+  "error": "not_found",
+  "message": "Package types not found"
+}
+```
+
+## Local Development
+
+```bash
+cd docs-api
+deno run --allow-net --allow-env api/generate.ts
+```
+
+## Environment Variables
+
+- `API_SECRET` (optional): Bearer token for authentication