feat: support npx install from git URL

Add prepare script so TypeScript compiles automatically when installed
via git. Update README and MCP client config examples to use
git+https://git.ezscale.cloud/EZSCALE/virtfusion-mcp.git URLs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -7,8 +7,14 @@
   "bin": {
     "virtfusion-mcp": "dist/index.js"
   },
+  "files": [
+    "dist",
+    "README.md",
+    "LICENSE"
+  ],
   "scripts": {
     "build": "tsc",
+    "prepare": "npm run build",
     "start": "node dist/index.js",
     "dev": "tsx src/index.ts",
     "extract-endpoints": "tsx scripts/extract-endpoints.ts",