Move `redox_w` into `redox`

[dunk2k]

cc: @mattdibi

Description

Continuing from suggestion of #21045, have merged redox_w into redox dir

Types of Changes

• [ ] Core
• [ ] Bugfix
• [ ] 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 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.
• [ ] I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[dunk2k]

@mattdibi

Would you be able to give this one a look over/your blessing?

[dunk2k]

May as well remove the user keymaps here.

fair shout 😊 Implemented as per commit eeb76ba