Adding back Support for Keychron K3 v2 to sn32_develop

[macaholik]

Description

Added back support for Keychron K3 v2 ISO from the sn32_master branch

Types of Changes

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

[shirok1]

Hello, I would like to port Keychron K6 support from old branch. Are there any reminders/instructions to follow? Or is it as simple as copying old code and paste them to the develop branch?

[macaholik]

Hello, I would like to port Keychron K6 support from old branch. Are there any reminders/instructions to follow? Or is it as simple as copying old code and paste them to the develop branch?

You can find infos about how to add back support in this issue #420