Added the Scene Manager (Libreflow casting, load, update, assetize)

New Scene Manager panel (WTD tab) talking to a running Libreflow through
its IPC server and the wtdcmds commands: pick the shot context, read the
casting, link the latest available publishes (overrides for chars and
props, collection instances otherwise), flag out-of-date versions in red,
update / roll back / remove loaded assets, and publish local collections
as assets. Requests run in the background. Settings in config.py
(SCENE_MANAGER_*, LIBREFLOW_*).

The Shot Viewer groups rigs loaded by the Scene Manager by asset type.
The manifest declares the network permission.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

blender_manifest.toml

@@ -16,12 +16,14 @@ copyright = ["2026 WTD"]
 
 [permissions]
 files = "Read reference, config and sound files"
+network = "Talk to the local Libreflow server (Scene Manager)"
 
 [build]
 paths_exclude_pattern = [
   "__pycache__/",
   "/.git/",
   "docs/",
+  "dev/",
   ".*",
   "*.blend",
   "*.md",