[Keyboard] Add RGB Matrix configuration to lotus58

[bryanalves]

Description

Provide an RGB matrix for lotus58 keyboards.

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).

[waffle87]

• This should be added to the top keyboard level info.json file, so it is used by all revisions (since the only difference is microcontroller)
• Please run qmk format-json on the file you modify (spaces instead of tabs, mostly)

[bryanalves]

• This should be added to the top keyboard level info.json file, so it is used by all revisions (since the only difference is microcontroller)
• Please run qmk format-json on the file you modify (spaces instead of tabs, mostly)

Made the requested updates. I had originally had tabs for the change because that is what matched the rest of the formatting for the file. The top level info.json is properly formatted with spaces instead of tabs, and so I ensured that I matched the format of that file as well.

[zvecr]

The split_count config not matching the rgblight one looks rather suspect?

[bryanalves]

The board has 2 different RGB modes: a per key RGB, and a backlight-only mode. The board supports both being connected at the same time, but it's highly recommended not to as it will typically consume too much power for the USB bus.

(Almost) everybody who opts to use the per-key RGB matrix setup will not also have the backlight-only LEDs installed.