[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/rules.mk

@@ -13,6 +13,10 @@ AUDIO_ENABLE               = no  # Audio output
 UNICODE_ENABLE             = no  # Unicode
 RGBLIGHT_ENABLE            = no  # Enable WS2812 RGB underlight.
 SWAP_HANDS_ENABLE          = no  # Enable one-hand typing
+OS_DETECTION_ENABLE        = no
+CUSTOM_UNICODE_ENABLE      = no
+CUSTOM_POINTING_DEVICE     = no
+CUSTOM_SPLIT_TRANSPORT_SYNC = no
 
 USE_ARM_CONFIG ?= no
 ifeq ($(strip $(CONVERT_TO)), proton_c)
@@ -27,19 +31,26 @@ endif
 ifeq ($(strip $(MCU)), STM32F401)
     USE_ARM_CONFIG = yes
 endif
+ifeq ($(strip $(MCU)), STM32F411)
+    USE_ARM_CONFIG = yes
+endif
+
+ifeq ($(strip $(MCU)), atmega32u4)
+    BOOTLOADER             = qmk-hid
+    BOOTLOADER_SIZE        = 512
+endif
 
 ifeq ($(strip $(USE_ARM_CONFIG)), yes)
     HAPTIC_ENABLE          = no
     WS2812_DRIVER          = pwm # won't work without a patch to the ctpc mk file
     SERIAL_DRIVER          = usart
-    SWAP_HANDS_ENABLE      = yes
     WPM_ENABLE             = yes
-    AUTOCORRECTION_ENABLE  = yes
+    AUTOCORRECT_ENABLE     = yes
     CAPS_WORD_ENABLE       = yes
-else
-    CUSTOM_UNICODE_ENABLE  = no
-    BOOTLOADER             = qmk-hid
-    BOOTLOADER_SIZE        = 512
+    OS_DETECTION_ENABLE    = yes
+    CUSTOM_UNICODE_ENABLE      = no
+    CUSTOM_POINTING_DEVICE     = no
+    CUSTOM_SPLIT_TRANSPORT_SYNC = no
 endif
 
 ifeq ($(strip $(KEYBOARD)), crkbd/rev1)
@@ -47,7 +58,3 @@ ifeq ($(strip $(KEYBOARD)), crkbd/rev1)
     RGB_MATRIX_ENABLE      = yes
     HAPTIC_ENABLE          = no
 endif
-
-ifeq ($(strip $(KEYBOARD)), cantor)
-    SWAP_HANDS_ENABLE      = no
-endif