Add Apluxs Pulsar XBOARD QS keyboard (1st commit)

[skylupin03]

Description

This is a PR to add the keyboard "Aplusx, PULSAR XBOARD QS" to QMK.

Thank you for taking the time to review this submission

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

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).

[skylupin03]

While learning while referring to other people's codes, I accidentally changed the code, I'm so sorry. I revised it as carefully as possible I'm sorry I'm not good enough

[skylupin03]

It's gotten a lot complicated. I'll clean it up and do PR again, thank you for reviewing it