[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

1 files changed, 2 insertions, 2 deletions

diff --git a/users/drashna/callbacks.h b/users/drashna/callbacks.h
index 15f8997619..d3d260378d 100644
--- a/users/drashna/callbacks.h
+++ b/users/drashna/callbacks.h
@@ -5,7 +5,7 @@
 
 #include "quantum.h"
 
-void          matrix_init_keymap(void);
+void          keyboard_post_init_keymap(void);
 void          matrix_init_secret(void);
 void          shutdown_keymap(void);
 void          suspend_power_down_keymap(void);
@@ -19,7 +19,7 @@ void          eeconfig_init_keymap(void);
 void          housekeeping_task_keymap(void);
 
 #ifdef CUSTOM_UNICODE_ENABLE
-void matrix_init_unicode(void);
+void keyboard_post_init_unicode(void);
 #endif
 #ifdef SPLIT_KEYBOARD
 void matrix_slave_scan_keymap(void);