[Keymap] Drashna updates for 0.19 (#19175)

* Fix up bastardkb boards since blackpill support is officially added.
  * Check for blackpill version, not elite c.
  * Add checks in chibiOS config since multiple ARM controllers supported.
  * Rework rules.mk for keymaps to better handle arm vs avr support
* Start moving away from `matrix_*_*` functions.
  * `housekeeping_task_*` instead of `matrix_scan_*`
  * `keyboard_(pre|post)_init_*` instead of `matrix_init_*` 
* Add ℂℴmⅈℂ unicode input method.
* Clean up unicode code to be more compact and flexible.
* Remove/move Pro Micro LED commands to userspace and better filter them
* Fixup OLED code
  * Use newer quantum keycode functions/preprocessors rather than manual bit manipulation
  * Make unicode mode render much more compact/simple.
* Make qmk secrets more self contained
* Remove custom implementation of split watchdog

layouts/community/split_3x6_3/drashna/config.h

@@ -80,8 +80,13 @@
 #    define NO_MUSIC_MODE
 #endif
 
-#ifdef HAPTIC_ENABLE
-#    define SOLENOID_PIN B7
+#if defined(HAPTIC_ENABLE)
+#    if defined(CONVERT_TO_PROTON_C)
+#        define A13 PAL_LINE(GPIOA, 13)
+#        define SOLENOID_PIN A13
+#    else
+#        define SOLENOID_PIN B7
+#    endif
 #endif
 
 #undef PRODUCT