[Keyboard] Add UA62 keyboard (#7290)

* Added UA62

Added UA62 Keyboard

* Update readme.md

* Made changes based on code review

Updated files.

* Rename UA62.c to ua62.c

* Rename UA62.h to ua62.h

* Rename keyboards/UA62/readme.md to keyboards/ua62/readme.md

* Rename keyboards/UA62/keymaps/default/keymap.c to keyboards/ua62/keymaps/default/keymap.c

* Rename keyboards/UA62/config.h to keyboards/ua62/config.h

* Update and rename keyboards/UA62/info.json to keyboards/ua62/info.json

* Rename keyboards/UA62/rules.mk to keyboards/ua62/rules.mk

* Rename keyboards/UA62/ua62.c to keyboards/ua62/ua62.c

* Rename keyboards/UA62/ua62.h to keyboards/ua62/ua62.h

* Update keyboards/ua62/readme.md

keyboards/ua62/rules.mk

@@ -0,0 +1,32 @@
+# 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
+#   ATmega328P   USBasp
+BOOTLOADER = caterina
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = yes        # Console for debug
+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 = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+MIDI_ENABLE = no            # MIDI support
+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