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.

tests/test_moge_onnx.py

@@ -13,7 +13,7 @@ PROJECT_ROOT = Path(__file__).resolve().parents[1]
 def load_module():
     specification = importlib.util.spec_from_file_location(
         "snapform_moge_onnx",
-        PROJECT_ROOT / "src" / "snapform" / "moge_onnx.py",
+        PROJECT_ROOT / "src" / "snapform" / "ai_service" / "moge_onnx.py",
     )
     module = importlib.util.module_from_spec(specification)
     specification.loader.exec_module(module)