Minor cleanup of bcat keymaps and userspace

[bcat]

Description

Added license headers to all my keymap/userspace sources still missing them, clang-formatted my source files, tweaked keymap code in insubstantial ways, and updates some of my keymap readme files. There shouldn't be any functional changes in this PR.

Types of Changes

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

Issues Fixed or Closed by This PR

None

Checklist

• My code follows the code style of this project: C, Python
• 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.
• 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).

[stale]

Thank you for your contribution!
This pull request has been automatically marked as stale because it has not had activity in the last 45 days. It will be closed in 30 days if no further activity occurs. Please feel free to give a status update now, or re-open when it's ready.
For maintainers: Please label with awaiting review, breaking_change, in progress, or on hold to prevent the issue from being re-flagged.

[bcat]

@drashna, looks like this got lost in the shuffle. I'm not in a rush, but the stalebot is getting impatient so I figured I'd ask:

1. Do I need to do anything special to get this in the queue for other reviewers? Or is there just a big backlog of PRs? (Totally understandable if so.)
2. I've got some additional keymap/userspace changes ready to go. I'd been waiting to send a PR for them until after this PR was merged, since this one is just a cleanup. But would it be easier to review if I dropped this PR and sent a new one with the subsequent changes integrated as well?

Thanks!

[drashna]

Might as well add it to this, yeah.

[bcat]

Might as well add it to this, yeah.

Sorry, I didn't catch this in time before it was merged. No big deal, I can send a follow-up PR. I totally get there's a massive amount of incoming PRs and I'm not in any rush on this stuff. :)

Thanks all for the reviews BTW!