[Keymap] Adding Frosty Flake VIA keymap (#13211)
* updated my personal layouts
* added Artix to install script
* setting up for PR
* added Artix to install script
* Created frosty flake via keymap.c
Created the default VIA keymap.c file for the Frosty Flake controller
* Create rules.mk
* add #define DYNAMIC_KEYMAP_LAYER_COUNT 3
* Update keymap.c
* Delete keyboards/tada68/keymaps/trashcat directory
* Create keymap.c
* Create README.md
* Create rules.mk
* Delete keyboards/whitefox/keymaps/trashcat directory
* Update qmk_install.sh
* Rename README.md to readme.md
* Update keymap.c
* Update keymap.c
* Apply suggestions from code review
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