[Keyboard] Add cKeys' "The Dora" Board (#6469)

* Initial 4x5

* More board

* Update exboard

* Update

* Change name to thedora

* Update keyboards/ckeys/thedora/keymaps/default/keymap.c

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update keyboards/ckeys/thedora/config.h

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Remove the slash

* Attempt at fixing moxygen line break issues

* Update keyboards/ckeys/thedora/config.h

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Add boilerplate

* Update keyboards/ckeys/thedora/config.h

Co-Authored-By: Drashna Jaelre <drashna@live.com>

keyboards/ckeys/thedora/rules.mk

@@ -0,0 +1,19 @@
+MCU = STM32F303
+
+# Build Options
+#   comment out to disable the options.
+#
+BACKLIGHT_ENABLE = no
+BOOTMAGIC_ENABLE = yes  # Virtual DIP switch configuration
+## (Note that for BOOTMAGIC on Teensy LC you have to use a custom .ld script.)
+MOUSEKEY_ENABLE = yes # Mouse keys
+EXTRAKEY_ENABLE = yes # Audio control and System control
+CONSOLE_ENABLE = no  # Console for debug
+COMMAND_ENABLE = no    # Commands for debug and configuration
+#SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+NKRO_ENABLE = yes     # USB Nkey Rollover
+AUDIO_ENABLE = yes
+MIDI_ENABLE = yes     # MIDI controls
+RGBLIGHT_ENABLE = no
+ENCODER_ENABLE = yes
+# SERIAL_LINK_ENABLE = yes