[Keyboard] add tg67 (#18225)

keyboards/yandrstudio/tg67/readme.md

@@ -0,0 +1,22 @@
+# tg67
+
+![tg67](https://imgur.com/gKRrQLkh.png)
+A 65% keyboard with RGBs.
+This keyboard use 16mhz HSE and APM32F103 as MCU.
+
+- Keyboard Maintainer: https://github.com/jiaxin96
+- Hardware Supported: tg67
+- Hardware Availability: https://kineticlabs.com/
+
+Make example for this keyboard (after setting up your build environment):
+
+    make yandrstudio/tg67:default
+
+See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
+
+## Bootloader
+
+Enter the bootloader in 2 ways:
+
+- **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key which is Escape in this keyboard) and plug in the keyboard
+- **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available.