ADD KB19 keyboard

[DOIO2022]

Description

Add KB19 keyboard

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

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).

[zvecr]

You should not open new PRs with exactly the same content, in some poor attempt to jump it to the top of the PR queue.

[DOIO2022]

You should not open new PRs with exactly the same content, in some poor attempt to jump it to the top of the PR queue.
@zvecr hi, the pr #22393 is the kb3x keyboard ,but it was blocked so long time , I think it maybe has problems ,so I did this pr #22604. and by the way , if the pr don't have problems, how long can be mergerd? Thank you!!