merge: integrate OrcaSlicer-ImageMap onto kx-v2.4.2 base

Rebuilds experimental/imagemap on the correct base. The previous attempt
merged onto upstream 8500fcdcca, which silently dropped all 13 KX commits
(branding, Gitea updater, Kobra X profile, AMS fixes) and reverted the
Moonraker AMS feature set.

Conflict resolution:
- KX side: branding assets, workflows, Kobra X profile, Gitea updater,
  GUI_App declarations, PrintObject filament-id structure, GLCanvas3D
  reload fixes, PresetBundle extruder validation, ZAA/Polyline3 in GCode.
- ImageMap side: texture/colour machinery (GCode texture sampling,
  ToolOrdering zone resolution, MeshBoolean provenance, CGAL repair
  colour remap, top-surface image fill params).
- Rewrote ImageMap's wall_filament/sparse_infill_filament/
  solid_infill_filament accesses onto the KX *_filament_id options
  instead of adding duplicate config fields.

.devcontainer/devcontainer-lock.json

@@ -0,0 +1,9 @@
+{
+  "features": {
+    "ghcr.io/devcontainers/features/desktop-lite:1": {
+      "version": "1.2.9",
+      "resolved": "ghcr.io/devcontainers/features/desktop-lite@sha256:d8649bc8ca8e50a52fbee29d281739ea05dc1022905b185434d6bbe9afc8f221",
+      "integrity": "sha256:d8649bc8ca8e50a52fbee29d281739ea05dc1022905b185434d6bbe9afc8f221"
+    }
+  }
+}