[MECHWILD] New Keyboard BB65

[stephondoestech]

Description

Submitting this on behalf of @lesshonor. This is to add a default keymap for the BB65 to the core qmk repo. This keymap is the same as the image listed on the hardsite shown here.

Types of Changes

• [x] Core
• [ ] Bugfix
• [ ] New feature
• [ ] Enhancement/optimization
• [x] Keyboard (addition or update)
• [x] Keymap/layout/userspace (addition or update)
• [x] 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.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] 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).