[Keyboard] Doro67 Multi PCB port (#5539)

* Initial portover of the doro68.json with corrected column pins.

* Initial setup of LAYOUT_ansi and it's use in the default keymap.

* Added F keys to default kemap on layer 1.

* Added split space (and everything else) layout and a base keymap to be updated.

* Renamed split_space to multi.

* Changed product_id for doro.

* Created a basic doro LAYOUT_iso and default keymap.

* Copied over basic layout and keymap.

* Added readme.md for doro67 multi.

* Removed basic keyboad layout and keymap because it's a separate PCB.

* Added backlight controls to the various keymaps.

* Added explicit backlight pin define.

* Increased number of backlight levels for flexibility.

* Removed unnecessary line slashes and unified keymcaps.

* Corrected ISO layout and switched position with multi.

* Added keymap readme.md files.

* Corrected ISO keymap.

* Added Layouts to info.json for toolbox.

* Re-added slashes as they were necessary here...

* Corrected info.json/keymap discreptancies.

* Updated copyright messages (and fixed small readme error).

* Added missing line break spaces in readme.md

Co-Authored-By: ShadeDream <nick@shadedream.com>

* Keymap alignments on default_multi readme.md

Co-Authored-By: ShadeDream <nick@shadedream.com>

* Keymap alignments on default_multi readme.md

Co-Authored-By: ShadeDream <nick@shadedream.com>

* Keymap alignments on default_multi readme.md

Co-Authored-By: ShadeDream <nick@shadedream.com>

* Small alignment adjustment on the default keymap readme.md

Co-Authored-By: ShadeDream <nick@shadedream.com>

keyboards/doro67/multi/rules.mk

@@ -0,0 +1,47 @@
+MCU = atmega32u4
+F_CPU = 16000000
+ARCH = AVR8
+F_USB = $(F_CPU)
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   atmega32a    bootloadHID
+BOOTLOADER = atmel-dfu
+
+
+# If you don't know the bootloader type, then you can specify the
+# Boot Section Size in *bytes* by uncommenting out the OPT_DEFS line
+#   Teensy halfKay      512
+#   Teensy++ halfKay    1024
+#   Atmel DFU loader    4096
+#   LUFA bootloader     4096
+#   USBaspLoader        2048
+# OPT_DEFS += -DBOOTLOADER_SIZE=4096
+
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite      # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = yes        # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes        # Audio control and System control(+450)
+CONSOLE_ENABLE = yes         # Console for debug(+400)
+COMMAND_ENABLE = yes         # 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 = yes       # Enable keyboard backlight functionality on B7 by default
+RGBLIGHT_ENABLE = no         # Enable keyboard RGB underglow
+MIDI_ENABLE = no             # MIDI support (+2400 to 4200, depending on config)
+UNICODE_ENABLE = no          # Unicode
+BLUETOOTH_ENABLE = no        # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no            # Audio output on port C6
+FAUXCLICKY_ENABLE = no       # Use buzzer to emulate clicky switches
+HD44780_ENABLE = no          # Enable support for HD44780 based LCDs (+400)