[Keyboard] Fin pad (#17523)

Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/evyd13/fin_pad/readme.md

@@ -0,0 +1,27 @@
+# Fin Pad
+
+![Fin Pad](https://i.imgur.com/OC5O2SZ.png)
+
+A replacement PCB for the Lin Dolphin Pad
+
+* Keyboard Maintainer: [Evelien Dekkers](https://github.com/evyd13)
+* Hardware Supported: Fin Pad PCB
+* Hardware Availability: [Open source on GitHub](https://github.com/evyd13/fin-pad)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make evyd13/fin_pad:default
+
+Flashing example for this keyboard:
+
+    make evyd13/fin_pad: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**: 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