Adding support for the Pteron56 (PCB) keyboard

[Kraken-Jokes]

Description

This adds the core files for building the firmware for the Pteron56 PCB version developed by kraken-jokes. Included are all core files as well as default, user, brant (v1 PCB), and Via keymaps

Included in this PR are the initial files needed to make this keyboard work as well as keymaps with various functionality
-/pteron56
-config.h VENDOR_ID = 0x6D4B (mK) PRODUCT_ID = 0x7056 (p56)
-pteron56.c
-pteron56.h
-rules.mk
-readme.md

Keymaps:
-brant
-config.h (support for the V1 PCB)
-keymap.c essentially the default (QWERTY) keymap

-melissa
-configurable user/ password string code (strings have been replaced with XXXXXXXXXX), 10 key pad on layer2. QWERTY

-default
-QWERTY

-Via
-keymap.c QWERTY
-rules.mk LTO enable, VIAL enable, VIA enable

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).

[Kraken-Jokes]

Fixing files, will comment again when they're ready

[lesshonor]

This draft PR can be closed; the commits from it were picked up #21731, which was merged in September.