Add Elite-Pi converter

[nooges]

Description

Add converter for Elite-Pi controller board

Pinout reference:

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]

Also while i remember, does the Elite-Pi have vbus detection?

[drashna]

Should probably also add a "CONVERT_FROM=elite_c" option too.

[sadekbaroudi]

Should probably also add a "CONVERT_FROM=elite_c" option too.

@drashna - why have a CONVERT_FROM parameter... there is only one option to convert from? This is fixed hardware with a fixed footprint and pinout. It's an unnecessary parameter. Just do right by the hardware. This is the same argument and issue I'm struggling with for #18239

[keyboard-magpie]

What's wrong with considering these converters to be a general "convert from AVR" tool?

[zvecr]

What's wrong with considering these converters to be a general "convert from AVR" tool?

Because pinout matters. trying to run this on something that uses an AVR teensy just wouldnt give the expected result.

Should probably also add a "CONVERT_FROM=elite_c" option too.

This is kind of what the PIN_COMPATIBLE option is intended for. Adding in a elite_c option is already possible. There could be an option for less duplication if there was a way to infer that a elite_c converter would also work for promicro but not the other way round.