refactor: transition from MCP to REST API for portfolio data

- Removed MCP server integration and related components from index.vue and contact.json.
- Updated project documentation to reflect the new ArtAPI server, including changes to project metadata and descriptions.
- Eliminated MCP toolkit dependencies from nuxt.config.ts and package.json.
- Introduced new REST API endpoints for chat prompts, replacing previous MCP prompts.
- Deleted obsolete MCP resources and prompts, streamlining the codebase for a more focused API approach.

content/contact.json

@@ -36,11 +36,6 @@
             "icon": "i-ph:globe-duotone",
             "value": "https://arthurdanjou.fr"
         },
-        {
-            "name": "MCP Server",
-            "icon": "i-ph:globe-duotone",
-            "value": "https://api.arthurdanjou.fr/mcp"
-        },
         {
             "name": "Status Page",
             "icon": "i-ph:fire-duotone",