Updated matrix.c for some PS2AVRGB boards and templates for new_project script (#2992)
* Add M6-A keymap
* Update XD60 keymap
* Update XD60 keymap readme
* Update JJ40 and Let's Split keymaps
* Add readme for M6-A
* Fix typo, update JJ40 README
* Update jj40 readme
* Cleanup jj40 keymap
* Revert Let's Split QWERTY layer to default before #2010
* Update numpad layers
* Fix: Let's Split keymap getting stuck mods due to having keycodes assigned on the Raise layer
* Keep ASCII art consistent with keymap
* Staryu: initial port
* Add personal keymap
* Added and updated READMEs
* Fix: default keymap for staryu
* Rudimentary backlight support.
* Enabled mousekeys for default keymap
* use QMK_KEYBOARD_H and LAYOUT
* Update readme.md for NIU mini: flash using avrdude
* Fix missing linebreaks for Staryu README
* Update readme.md
* Update PS2AVRGB boards with new matrix.c
* Update canoe matrix.c; untested
* Fix canoe.c for building (needs matrix_scan_user and matrix_init_user)
* Add personal Iris keymap
* Update keymap
* Update keymap
* Update keymap, disable backlighting and underglow
* Move PrintScreen button
* Add README