Updates to Ploopy Classic, Mouse, and Thumb for RP2040 hardware upgrade

[ploopyco]

Description

The Ploopy Mouse, Thumb, and Classic are all being upgraded from their original MCU architecture (ATmega32u4) to a new MCU architecture (RP2040). These new firmwares have all been tested and are currently being distributed.

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

• None.

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).