Refactor transform and crop handling for OBS 30+ API compatibility

[anthnyjhn]

Rewrote transform capture logic using:

• obs_sceneitem_get_pos
• obs_sceneitem_get_scale
• obs_sceneitem_get_bounds
• obs_sceneitem_get_crop
• obs_sceneitem_get_rot, obs_sceneitem_get_bounds_type, obs_sceneitem_get_bounds_alignment

Replaced transform restoration logic to use individual setter functions:

• obs_sceneitem_set_pos, obs_sceneitem_set_scale, obs_sceneitem_set_bounds, etc.

Removed obsolete transform info struct usage (obs_transform_info).
Added explicit handling for bounds_type, bounds_alignment, and rotation.

NOTE: Preserved original crop data handling for backward compatibility with (v29.1.3).