Add new functionality for image rectification and depth metadata handling

- Implemented a preview tool for rectifying images with interactive aspect controls in `preview.py`.
- Added tests for depth metadata loading to ensure consistent schema usage in `test_depth_metadata.py`.
- Developed comprehensive tests for cutout calibration processes in `test_cutout_calibration.py`, including stability checks and depth calibration.
- Created tests for frame compositing operations in `test_frame_compositing.py`, ensuring correct handling of depth and transparency.
- Introduced material slot inheritance functionality in `material_slots.py` to manage geometry material assignments.
- Built shared shader nodes for material processing in `shader.py`, including roughness and bump mapping setups.

tests/tools/test_manifest.py

@@ -15,7 +15,6 @@ class ExtensionManifestTest(unittest.TestCase):
         self.assertEqual(self.manifest["schema_version"], "1.0.0")
         self.assertEqual(self.manifest["id"], "anyimage")
         self.assertEqual(self.manifest["type"], "add-on")
-        self.assertNotIn("bl_info", self.manifest)
 
     def test_declares_required_environment_permissions(self):
         self.assertEqual(