feat(tiles-server): add tileset MCP server

[MKartaviciute]

Summary

Add a new MCP server for managing 3D Tilesets on the CesiumJS globe.

tiles_mcp_server.mp4

Closes #28

New Tools

Tool	Description
tileset_load	Load a 3D Tileset from a URL with optional style and clipping
tileset_remove	Remove a loaded tileset from the scene
tileset_style	Apply or update 3D Tiles styling (color conditions, show conditions)
tileset_list	List all currently loaded tilesets

Source Types

• url — Direct URL to a 3D Tiles tileset (tileset.json endpoint)
• ion — Cesium Ion 3D Tiles assets (e.g., Cesium OSM Buildings with asset ID 96188)

Tileset Options

• style — 3D Tiles style object with color and show conditions
• clippingPlanes — Define clipping plane configuration to crop the tileset
• maximumScreenSpaceError — Control level-of-detail quality (default: 16)

Changes

Server (servers/tiles-server/)

• Zod v4 schemas: core data types, tool inputs, response structures
• Four tool handlers with parameter validation and error handling
• Utility helpers for tileset ID tracking and error formatting
• Port 3008, following existing server conventions

Client (test-applications/packages/client-core/)

• CesiumTilesManager implementing ManagerInterface
  • loadTileset: Creates Cesium3DTileset from URL or Ion asset, registers it with the scene
  • removeTileset: Removes a tileset by ID from the scene primitives collection
  • styleTileset: Applies a Cesium3DTileStyle to a loaded tileset
  • listTilesets: Returns metadata for all currently loaded tilesets
• Type definitions extending MCPCommandResult

Integration

• Registered in monorepo build/dev/test scripts
• Added to web app configuration (esbuild defines, app.ts server list)
• Updated parent README with tiles server documentation

Testing

• Unit tests across schema, load, remove, style, and list handlers
• Client-side unit tests with full Cesium module mocking
• All existing monorepo tests continue to pass

Author checklist

• I have submitted a Contributor License Agreement
• I have performed a self-review of my code