Custom Unicode

To disable, add CUSTOM_UNICODE_ENABLE = no to the keymap's rules.mk.

This disables all of the various implementations of unicode, enables the common unicode core, and allows usage.

In addition to a number of unicode keycodes:

There are a number of unicode typing modes. This replaces the normal alpha keys with special unicodes.

KC_WIDE - ｔｈｉｓｉｓｗｉｄｅｍｏｄｅ
KC_SCRIPT - 𝓽𝓱𝓲𝓼 𝓲𝓼 𝓼𝓬𝓻𝓲𝓹𝓽 𝓶𝓸𝓭𝓮
KC_BLOCKS - 🆃🅷🅸🆂 🅸🆂 🅱🅻🅾🅲🅺 🅼🅾🅳🅴
KC_REGIONAL - 🇹‌‌🇭‌‌🇮‌‌🇸‌‌ ‌‌🇮‌‌🇸‌‌ ‌‌🇷‌‌🇪‌‌🇬‌‌🇮‌‌🇴‌‌🇳‌‌🇦‌‌🇱‌‌ ‌‌🇲‌‌🇴‌‌🇩‌‌🇪‌‌
KC_AUSSIE - ǝpoɯ ǝᴉssnɐ sᴉ sᴉɥʇ
KC_ZALGO - t̨͕͙̺͍͐̾ĥ̻ï̳̻̗̜͔ͦs͎̠͈͓͗̀ i̶̫ͭ̆s̛̫̻̜̝͑͡ z̩͈̠͗a͚̜̓͜l͈̟g͋͢͝ò͚ͥ͘͡͞ ḿ̴̡̻̼̔ͪò͔̭̿ͪ̍ḏ̻̊̄̈e̳͕̤ͣͯ
KC_NOMODE - this is the normal typing mode with no unicode glyphs

Credit goes to ridingqwerty and tzarc for the unicode typing modes.