Add reusable local HTTP job service for Blender add-ons

- Implement JobClient for handling HTTP requests to the JobServer.
- Create ModalJobOperatorBase for managing Blender job lifecycle.
- Introduce JobContext and JobServer for job management and state handling.
- Add ServiceConnection and ServiceController for managing service processes.
- Implement job submission, cancellation, and resource management endpoints in the server.
- Ensure proper error handling and job state updates throughout the service.

tools/validate_moge_surface.py

@@ -9,8 +9,8 @@ import numpy as np
 PROJECT_ROOT = Path(__file__).parents[1]
 sys.path.insert(0, str(PROJECT_ROOT / "src"))
 
-from snapform.image_depth import MOGE_SURFACE_MATERIAL_NODE_GROUP_NAME
-from snapform.image_mesh import (
+from snapform.blender.depth_plane import MOGE_SURFACE_MATERIAL_NODE_GROUP_NAME
+from snapform.blender.surface import (
     MOGE_NODE_GROUP_NAME,
     build_image_mesh,
     prepare_moge_surface_archive,