feat: standalone MCP server (ra-h-mcp-server)

- Added apps/mcp-server-standalone/ with direct SQLite access
- Works without RA-OS app running
- Install via: npx ra-h-mcp-server
- Updated docs/8_mcp.md with setup instructions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/mcp-server-standalone/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "ra-h-mcp-server",
+  "version": "1.0.0",
+  "description": "Connect Claude Code/Desktop to your RA-H knowledge base. Direct SQLite access - no web app required.",
+  "main": "index.js",
+  "bin": {
+    "ra-h-mcp-server": "./index.js"
+  },
+  "scripts": {
+    "start": "node index.js"
+  },
+  "keywords": [
+    "mcp",
+    "claude",
+    "claude-code",
+    "claude-desktop",
+    "knowledge-base",
+    "knowledge-management",
+    "sqlite",
+    "ra-h",
+    "rah",
+    "pkm",
+    "second-brain"
+  ],
+  "author": "Bradley Morris <bradwmorriswork@gmail.com>",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/bradwmorris/ra-h"
+  },
+  "homepage": "https://ra-h.app",
+  "bugs": {
+    "url": "https://github.com/bradwmorris/ra-h/issues"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.0.0",
+    "better-sqlite3": "^11.0.0",
+    "zod": "^3.23.0"
+  },
+  "engines": {
+    "node": ">=18.0.0"
+  },
+  "files": [
+    "index.js",
+    "services/",
+    "README.md"
+  ]
+}