[keyboard] add bear_face/v3, folder maintenance

[will-hedges]

Added bear_face/v3, updated keyboard folder to align with latest documentation, with particular attention to moving backlight functionality to json files and removing version C files.

Description

• updated kb config.h
• updated kb info.json, fixed version-level keyboard.json files
• moved caps lock/backlight code to appropriate json files
• updated SAFE_RANGE to QK_KB_0
• updated READMEs
• added bear_face/v3
• removed old version C files (ex. v1.c etc.)

Types of Changes

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

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 change to the documentation.
• [ ] 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).

[will-hedges]

From the PR checklist:

• keyboard updates and refactors (eg. to data driven) must go through develop

Also the following would probably apply

• PRs should contain the smallest amount of modifications required for a single change to the codebase

  • multiple keyboards at the same time is not acceptable

Where possible, refactoring should really be completed within a separate PR.

Apologies for missing going through develop, and since I couldn't get any version to compile I assumed I would need to update all 3 in one PR. I am happy to close this one and open 3 separate ones into develop if need be. Thanks