refactor: mechwild/waka60

[lesshonor]

Description

• The audio vendor keymap was removed as part of 2023's big purge; while a mistake in name it's probably better in practice to just enable audio across the board. The kit ships with a speaker.
• Add RGB Matrix configuration.
• Add missing LAYOUT options.
• standard cleanup:
  • removal of unnecessary transparent layers
  • DD migration of locking keys
  • qmk format-json -i keyboards/mechwild/waka60/info.json

Types of Changes

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

Issues Fixed or Closed by This PR

Per the PR checklist:

• If the keyboard has multiple electrical/switch layouts:
  • include a LAYOUT_all which specifies all possible layout positions in the electrical matrix
  • use alternate layout names for all other possible layouts, preferring community layout names if an equivalent is available (e.g. LAYOUT_tkl_ansi, LAYOUT_ortho_4x4 etc.)

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).