Added Iris Rev6a layout and Milk 2% layout

[JellyTitan]

Description

Added an Iris6a layout with advanced programming examples. Specifically, examples for rotary encoders and per-key RGB.

Added fancy copy/paste layout for milk 2%

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).

[keyboard-magpie]

For future reference, we recommend against committing to your master branch as you've done here, because pull requests from modified master branches can make it more difficult to keep your QMK fork updated. It is highly recommended for QMK development – regardless of what is being done or where – to keep your master updated, but NEVER commit to it. Instead, do all your changes in a branch (branches are basically free in Git) and issue PRs from your branches when you're developing.

There are instructions on how to keep your fork updated here:

Best Practices: Your Fork's Master: Update Often, Commit Never

Fixing Your Branch will walk you through fixing up your master branch moving forward. If you need any help with this just ask.

Thanks for contributing!