sn32 rgb: yet another major update - more modularity

[dexter93]

• Decouple key and rgb matrix scanning. Not always required - can live as a standalone rgb driver now
• init bugfixes for SN32_PWM_OUTPUT_ACTIVE_LOW
• configuration cleanup - everything is now in a header
• remove most hardcoded values, inherit and/or calculate instead
• driver renamed
• added 26x support
• introducing individual ( per channel) color correction/ luminosity fine tuning

Description

Types of Changes

• [x] Core
• [x] Bugfix
• [x] New feature
• [x] Enhancement/optimization
• [x] 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).

[fightforlife]

Working good for me on 268F with ROW2COL. But I had two things to change to make it perfect. Maybe a second board/user would be good to make sure these are no issues on my side/config.

Here I need to use current_key_col vs last_key_col, otherwise the keypress effects are lit one to the left. https://github.com/SonixQMK/qmk_firmware/blob/e3f4c6d48efb4c44aaab522752a6aec3531dfebf/drivers/led/sn32f2xx.c#L518-L522

This is also needed for HARDWARE_PWM. If not included, columns which have not the max amount of keys(rows) will light the last key all the time. https://github.com/SonixQMK/qmk_firmware/blob/e3f4c6d48efb4c44aaab522752a6aec3531dfebf/drivers/led/sn32f2xx.c#L389-L391 https://github.com/SonixQMK/qmk_firmware/blob/e3f4c6d48efb4c44aaab522752a6aec3531dfebf/drivers/led/sn32f2xx.c#L502-L504