Add keyboard TGR-910 (#8683)

* Add files via upload

* Update info.json

* Update info.json

* Update 910.h

* Update 910.h

* Update 910.h

* Update info.json

* Update 910.c

* Update 910.h

* Update config.h

* Update config.h

* Update keymap.c

* Update rules.mk

* Update readme.md

* Delete config.h

* Delete readme.md

keyboards/tgr/910/rules.mk

@@ -0,0 +1,24 @@
+# MCU name
+MCU = atmega32a
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
+BOOTLOADER = bootloadHID
+
+# build options
+BOOTMAGIC_ENABLE = no
+MOUSEKEY_ENABLE = no
+EXTRAKEY_ENABLE = yes
+CONSOLE_ENABLE = no
+COMMAND_ENABLE = yes
+BACKLIGHT_ENABLE = yes
+RGBLIGHT_ENABLE = yes
+WS2812_DRIVER = i2c
+
+OPT_DEFS = -DDEBUG_LEVEL=0