Plugins + Scripts MR Chroma Parts

1. Added an Enable Chroma Mode toggle.
2. Visible regions use their original skin materials when Chroma Mode is disabled.
3. Hands, genitalia, head, and body visibility controls remain active in both modes.
4. Hair, clothing, and head-collision options continue to work independently.
5. Reorganized the interface into Targeting, Chroma Body, Additional Options, and About sections.
6. Enlarged the multilingual help panel.
7. Improved section header alignment and appearance.
8. Visible original materials are released so other skin shader plugins can modify them.