[WIP] Refactor source management page to combine WMS and WMTS

[Copilot]

Refactor source management to merge WMS/WMTS into unified OGC service type (following QGIS bower pattern)

Plan:

• Analyze current TileWMS and WMTS interfaces and implementations
• Create unified IOGCTileService interface that combines WMS/WMTS capabilities
• Add serviceType discriminator field ('WMS' | 'WMTS') to distinguish between services
• Update serialization logic to handle unified type
• Update deserialization logic to create correct source based on serviceType
• Update ISerializedSource union type
• Test build and ensure backwards compatibility
• Verify test cases still work

Original prompt

现在需要你重构source 管理页面，参考qgis bower页面的实现，你先把wms/wmts 合成一个试试

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