[Keyboard] Add AkemiPad (#18790)

Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/adpenrose/akemipad/readme.md

@@ -0,0 +1,27 @@
+# AkemiPad
+
+![adpenrose/akemipad](https://i.imgur.com/2q4kJOAl.png)
+
+A numpad powered by a ProMicro (currently ATmega based), with multiple layout options and support for an encoder, a piezo buzzer, an OLED, and per-key RGB lighting.
+
+* Keyboard Maintainer: [Arturo Avila](https://github.com/ADPenrose)
+* Hardware Supported: AkemiPad v1 PCB
+* Hardware Availability: [Arturo Avila](https://github.com/ADPenrose) 
+
+Make example for this keyboard (after setting up your build environment):
+
+    make adpenrose/akemipad:default
+
+Flashing example for this keyboard:
+
+    make adpenrose/akemipad:default:flash
+
+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**: Quickly press two times the button on the back of the PCB
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available