Invisible Item Frames No more invisible mobs

## Invisible Item Frames – Update

### What's New
- Added **Subpack Support** so you can choose which item frames are invisible.
- Added three selectable options:
  - **Both Item Frames** *(Default)* – Makes regular and glow item frames invisible.
  - **Item Frame Only** – Makes only regular item frames invisible.
  - **Glow Item Frame Only** – Makes only glow item frames invisible.
- Updated pack configuration to support the new subpack options.
- Maintains compatibility with **Vibrant Visuals**.
- No behavior pack, scripts, or experimental features required.