[Keyboard] Add Owlet60 Keyboard to qmk_firmware/keyboards/handwired (#6803)

* first commit, skeleton code, not sure if working

* Owlet 60 working firmware, json not sure

* use json from kle to qmk converter

* deleted temporary text from owlet60.h

* owlet60 working oled and led firmware

* moved owlet60 to handwired

* updated readme.md

* Revert "owlet60 working oled and led firmware"

This reverts commit 27f9465aabd62d9ee445b477a02af348160532c1.

* Revert "moved owlet60 to handwired"

This reverts commit 9b8e8344fc303ddc4dcc3b023d4e9d05b89d5800.

* revert changes, moved owlet60 to handwired, updated copyright blurb

* fixed readme.md

* removed duplicate items

* resolve merge artifact

* Update keyboards/handwired/owlet60/readme.md

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

* check out merge artifacts with qmk master

* Update keyboards/handwired/owlet60/matrix.c

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

* Update keyboards/handwired/owlet60/matrix.c

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

* Update keyboards/handwired/owlet60/matrix.c

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

* Update keyboards/handwired/owlet60/matrix.c

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

* removed redundant rule on oled_testing/rules.mk, refactored mux switching code on matrix.c

keyboards/handwired/owlet60/rules.mk

@@ -0,0 +1,48 @@
+SRC += matrix.c
+
+# MCU name
+MCU = atmega32u4
+
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   atmega32a    bootloadHID
+BOOTLOADER = caterina
+
+
+# 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 = no       # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no        # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
+CONSOLE_ENABLE = no	        # Console for debug(+400)
+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 = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes       # 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)
+CUSTOM_MATRIX = yes
+OLED_DRIVER_ENABLE = no