[Keyboard] Add keyboard Getta25 (#7497)

* [Keyboard] Add keyboard Getta25

Add Getta25 keyboard.

A 25 keys Tenkey.
Salicylic-acid3

* Update keyboards/getta25/info.json

* Update keyboards/getta25/readme.md

* Update keyboards/getta25/readme.md

* Update keyboards/getta25/readme.md

* Update keyboards/getta25/info.json

* Update keyboards/getta25/info.json

* Update keyboards/getta25/info.json

* Update keyboards/getta25/info.json

* Update keyboards/getta25/keymaps/oled/glcdfont.c

* Update keyboards/getta25/keymaps/oled/glcdfont.c

* Keymap Update

Remove unnecessary code blocks

* Update keyboards/getta25/keymaps/oled/keymap.c

* Update keyboards/getta25/keymaps/oled/keymap.c

* Update keyboards/getta25/keymaps/oled/keymap.c

keyboards/getta25/rules.mk

@@ -0,0 +1,33 @@
+# 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 = no       # 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 = yes        # Commands for debug and configuration
+NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI controls
+AUDIO_ENABLE = no           # Audio output on port C6
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight. 
+OLED_DRIVER_ENABLE = yes
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+
+DEFAULT_FOLDER = getta25/rev1