[Keyboard] adding support for new keyboard Dawn (#11564)

* initial commit Dawn keyboard

* fixing some matrix

* final tweaks to keymaps and info.json layout

* fix info.json missing delimiter

* missing elements in info.json layout, resolved through lint

* fixed missing link image in readme

* Update keyboards/mechstudio/dawn/readme.md

Co-authored-by: Ryan <fauxpark@gmail.com>

Co-authored-by: David <david@tarpit.be>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/mechstudio/dawn/rules.mk

@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = qmk-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+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
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no       # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output