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.

tools/docs.py

@@ -0,0 +1,48 @@
+import argparse
+import subprocess
+import tomllib
+from pathlib import Path
+
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+
+
+def project_version():
+    """Return the documentation version declared by the project."""
+    project = tomllib.loads(
+        (PROJECT_ROOT / "pyproject.toml").read_text(encoding="utf-8")
+    )["project"]
+    return project["version"]
+
+
+def documentation_command(dev=False):
+    """Return the Mike or MkDocs command for the requested mode."""
+    if dev:
+        return ["mkdocs", "serve"]
+    return [
+        "mike",
+        "deploy",
+        "--update-aliases",
+        project_version(),
+        "latest",
+    ]
+
+
+def main(argv=None):
+    parser = argparse.ArgumentParser(description="Build or preview documentation.")
+    parser.add_argument(
+        "-dev",
+        "--dev",
+        action="store_true",
+        help="preview the current documentation with live reload",
+    )
+    args = parser.parse_args(argv)
+    subprocess.run(
+        documentation_command(args.dev),
+        cwd=PROJECT_ROOT,
+        check=True,
+    )
+
+
+if __name__ == "__main__":
+    main()