K-Type refactor (qmk#9864)

* K-Type refactor

* Declare QMK in product name again

* Hopefully fix matrix scanning

* Maybe this time

* Partial (literally) RGB Matrix support

* Put RGB_MATRIX_ENABLE into rgb keymap for now

* Add ifdefs for RGB config

* Set layer 1 to actually be layer 1...

* Update keyboards/k_type/readme.md

* Put all RGB config in keymap for now

* Set SDB high?

* Before `rgb_matrix_init()` would be best

* User level, not keyboard

* Combating dropped keys

* Nope

* Readme for RGB keymap

* Remove custom matrix

quantum/config_common.h

@@ -219,6 +219,8 @@
 #        define B15 PAL_LINE(GPIOB, 15)
 #        define B16 PAL_LINE(GPIOB, 16)
 #        define B17 PAL_LINE(GPIOB, 17)
+#        define B18 PAL_LINE(GPIOB, 18)
+#        define B19 PAL_LINE(GPIOB, 19)
 #        define C0 PAL_LINE(GPIOC, 0)
 #        define C1 PAL_LINE(GPIOC, 1)
 #        define C2 PAL_LINE(GPIOC, 2)