Implement AI Host functionality with model caching and job management

- Added ai_host.py to handle AI tasks with FastAPI integration.
- Introduced HostState and ModelCache classes for managing client connections and model loading.
- Implemented job submission and cancellation endpoints in the AI host.
- Enhanced tests for AI host functionality, including client tracking and job cancellation.
- Updated existing tests to accommodate changes in the operator and command structure.
- Refactored runtime commands to use request-based architecture instead of command-line arguments.
- Improved model loading logic to handle CUDA memory management and reuse models efficiently.

src/snapform/__init__.py

@@ -1,5 +1,6 @@
 import bpy
 
+from . import runtime
 from .image_depth import (
     ApplyRemovedBackground,
     BuildDepthPlane,
@@ -10,11 +11,18 @@ from .image_depth import (
 )
 from .operators import (
     CancelJob,
+    ControlHost,
     RunJob,
     cancel_active_job,
     close_active_job,
 )
-from .panel import DebugPanel, RuntimeModelsPanel
+from .panel import (
+    Ben2DebugPanel,
+    Da3DebugPanel,
+    DebugPanel,
+    HostPanel,
+    ModelsPanel,
+)
 from .preferences import SnapFormPreferences
 from .properties import SnapFormSettings
 from .status_bar import draw_status_bar
@@ -25,13 +33,17 @@ CLASSES = (
     SnapFormSettings,
     RunJob,
     CancelJob,
+    ControlHost,
     ApplyRemovedBackground,
     RemoveImageBackground,
     BuildDepthPlane,
     BuildOriginalDepthPlane,
     ConvertImageToDepthPlane,
-    RuntimeModelsPanel,
+    HostPanel,
+    ModelsPanel,
     DebugPanel,
+    Da3DebugPanel,
+    Ben2DebugPanel,
 )
 
 
@@ -43,11 +55,14 @@ def register():
     )
     bpy.types.STATUSBAR_HT_header.append(draw_status_bar)
     bpy.types.VIEW3D_MT_object_context_menu.append(draw_image_context_menu)
+    runtime.schedule_host_start()
 
 
 def unregister():
     cancel_active_job()
     close_active_job()
+    runtime.unschedule_host()
+    runtime.detach_host_client()
     bpy.types.VIEW3D_MT_object_context_menu.remove(draw_image_context_menu)
     bpy.types.STATUSBAR_HT_header.remove(draw_status_bar)
     if hasattr(bpy.types.Scene, "snapform_settings"):