Renderer support for the in-client image position editor:
- FurnitureBrandedImageVisualization applies offsetX/Y to the branded image
layer only (offsetZ stays as z-index/depth), so the image can be moved
without shifting the furni frame
- new `scale` branding key + FURNITURE_BRANDING_SCALE: zooms the image via a
real per-sprite scale (RoomObjectSprite.scale, default 1, applied in
RoomSpriteCanvas) — NOT by writing the read-only width/height
- AssetManager loads external raster images (png/jpg/…) via a CORS <img> +
Texture.from instead of Assets.load (which didn't load cross-origin images);
branding image download failures are now surfaced instead of swallowed
- parse extra room snapshot data such as hotel time, room item limit and group context
- expose richer furni metadata including flags, dimensions and teleport targets
- expose richer user metadata including room-entry fields and ids needed by inspection tools
- keep session and room engine models aligned with the new wired monitor/inspection flow
medievalshell