docs: update acronym

- Rename MCP acronym in documentation and package files
- Update site name, package description, and documentation references
- Ensure consistent terminology across project files

package.json

@@ -1,7 +1,7 @@
 {
   "name": "homeassistant-mcp",
   "version": "1.0.0",
-  "description": "Home Assistant Master Control Program",
+  "description": "Home Assistant Model Context Protocol",
   "main": "dist/index.js",
   "type": "module",
   "scripts": {