Add tools and tests for AnyImage model management and documentation

- Implement sync_models.py for preparing and uploading ONNX artifacts.
- Create build_node.py for building and validating Blender scripts.
- Add docs.py for building and previewing documentation with Mike or MkDocs.
- Introduce model_exports.py for exporting PyTorch models to ONNX format.
- Develop pack.py for packaging the project with dependencies for different platforms.
- Add test_sync_models.py to validate sync_models functionality.
- Add test_tool_commands.py to ensure repository tools have correct command scripts.
- Initialize tools package with __init__.py.

tests/test_tool_commands.py

@@ -0,0 +1,26 @@
+import tomllib
+import unittest
+from pathlib import Path
+
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+
+
+class ToolCommandsTests(unittest.TestCase):
+    def test_repository_tools_have_uv_commands(self):
+        project = tomllib.loads(
+            (PROJECT_ROOT / "pyproject.toml").read_text(encoding="utf-8")
+        )["project"]
+        self.assertEqual(
+            project["scripts"],
+            {
+                "pack": "tools.pack:main",
+                "build_node": "tools.build_node:main",
+                "sync_models": "tools.sync_models:main",
+                "docs": "tools.docs:main",
+            },
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()