#### Brief overview of PR changes/additions
Open additional 2D map windows showing different areas of the same map.
Views are dockable and controlled via menu or Lua.
New Lua functions:
- `createMapView([areaId])` - open a new map window
- `closeMapView(viewId)` - close a specific window
- `closeAllMapViews()` - close all extra windows
- `getMapViewIds()` - list open windows
- `getMapViewInfo(viewId)` - get window state
Extended with optional `viewId` parameter:
- `centerview(roomId, [viewId])`
- `setMapZoom(zoom, [areaId], [viewId])`
- `getMapZoom([areaId], [viewId])`
#### Motivation for adding to Mudlet
Allows viewing multiple map areas simultaneously - useful for navigation
planning, comparing areas, or keeping a zoomed-out overview while
exploring.
Upvoted suggestion in
https://discord.com/channels/283581582550237184/792073945922142259/1402147549585866854
#### Other info (issues closed, discussion etc)
**Test case:**
1. Load a profile with a map
2. Window → New map window (or run `createMapView()`)
3. Select different area in new window's dropdown
4. Verify both views update when moving rooms
5. Dock/undock the new window
6. Close via X button or `closeMapView(id)`
https://github.com/user-attachments/assets/1cd38f37-5b3e-4ae2-83e4-ea9478b9f68c
