Adding Ploopyco functions so Host State Control can be implemented for Ploopy Nano

[t4corun]

Addressed gap in Ploopy Nano where drag scroll and dpi cannot be accessed at the userspace level. User can now implement Host State Control in their keymap

Description

Extends on the current code base. Drag scroll variable and dpi cycling logic moved into functions so they can be called at the userspace level.

Types of Changes

• [ ] Core
• [ ] Bugfix
• [x] New feature
• [x] Enhancement/optimization
• [x] Keyboard (addition or update)
• [ ] Keymap/layout/userspace (addition or update)
• [ ] Documentation

Issues Fixed or Closed by This PR

N/A

Checklist

• [x] My code follows the code style of this project: C, Python
• [x] I have read the PR Checklist document and have made the appropriate changes.
• [ ] My change requires a chano the documentation.ge to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] I have tested the changes and verified that they work and don't break anything (as well as I can manage).