[Keyboard] Add omega4 (#16464)

keyboards/makenova/omega/omega4/readme.md

@@ -0,0 +1,23 @@
+# omega4
+
+![omega4](https://i.imgur.com/tV4iCoD.png)
+
+uniform stagger 4 row board.
+
+-   Keyboard Maintainer: [makenova](https://github.com/makenova)
+-   Hardware Supported: [omega4](https://github.com/makenova/omega)
+-   Hardware Availability: https://www.cbkbd.com/product/omega4-keyboard-kit
+
+Make example for this keyboard (after setting up your build environment):
+
+    qmk compile -kb makenova/omega/omega4 -km default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+-   **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+-   **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead
+-   **Keycode in layout**: Press the key mapped to `RESET` if it is available