Moved from api-to-mcp to internal MCP implementation.

Initial public release.

MCP Tools:

• Search elements and relations in the model
• Create and edit elements
• Create and edit relations
• Create and edit diagrams
  • Add elements and relations to a diagram, remove from a diagram, move elements
  • Support for nested elements
  • Export diagram images to PNG and SVG
• Get the list of available element and relation types
• Run scripts (requires the jArchi plugin to be installed)
• Retrieve status and openapi.json
• Batch operations