[Keyboard] Add KeyDeck8 (#20107)

Co-authored-by: jack <0x6a73@protonmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/handwired/maverick0197/keydeck8/readme.md

@@ -0,0 +1,40 @@
+# KeyDeck8
+
+Firmware for obscuresausage's Multimedia Key Deck.
+
+8 keys and and encoder powered by a Pro Micro.
+
+[Multimedia Key Deck model Files](https://www.printables.com/model/389352-multimedia-key-deck)
+
+
+![KeyDeck8](https://i.imgur.com/6G2LPLzl.jpg)
+
+---
+Wiring Diagram:
+
+![KeyDeck8 Wiring Diagram](https://i.imgur.com/1sOvYRUl.jpg)
+
+
+Pinouts for Pro Micro:
+
+![Promicro Pinout Guide](https://i.imgur.com/LZ194Hfl.jpg)
+
+---
+* Keyboard Maintainer: [Maverick0197](https://github.com/Maverick0197)
+* Hardware Supported: Pro Micro
+* Printed enclosure
+* Handwired
+* Requires a Pro Micro, 8 key switches and 1 KY040 encoder
+* Hardware Availability: [Make it yourself](https://github.com/Maverick0197/KeyDeck8)
+
+---
+Make example for this keyboard (after setting up your build environment):
+
+    make handwired/maverick0197/keydeck8: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).
+
+---
+Revision 0.0.1:
+-
+Initial release.