Use unicode to make better, shorter, more readable key labels in qmk info output.

[spidey3]

Description

qmk info has the ability to output human-readable keyboard layouts, but for many keys the output is truncated, making it hard to read and understand. To resolve that...

• qmk info now uses the QMK keycode database (.../data/constants/keycodes) to source human readable key names.
• Commonly used keys have been updated with Unicode labels, that are more likely to fit into the rendered key.
• Some simple heuristics have been added to shorten labels for some commonly used key bindings, making them fit better.
• The width of rendered keys has been increased to allow more room.

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout (addition or update)
• Documentation

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).