Add UTD80 PCB (#11799)

* Create readme.md

* Add files via upload

* Create readme.md

* Add files via upload

* Update utd80.h

* Update utd80.c

* Update keymap.c

Change 6 length underscore to 7.

* Update keyboards/utd80/readme.md

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

* Update keyboards/utd80/readme.md

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

* Update keyboards/utd80/readme.md

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

* Update keyboards/utd80/readme.md

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

* Update keyboards/utd80/readme.md

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

* Update utd80.c

* Update utd80.c

* Update keymap.c

* Apply #7701 PR review suggestions

* Add GPL license headers

* Replace led implementation with definition

* Add VIA keymap for UTD80

* Update attributions

Co-authored-by: UTDKeyboard <59077857+utdkeyboard@users.noreply.github.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: fauxpark <fauxpark@gmail.com>

keyboards/utd80/rules.mk

@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = full       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no       # 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 = yes            # USB Nkey Rollover
+BACKLIGHT_ENABLE = yes       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output