move keyhive exclusive boards into /keyhive (#16084)

Co-authored-by: Nick Brassel <nick@tzarc.org>

keyboards/keyhive/uno/readme.md

@@ -0,0 +1,34 @@
+# Uno
+
+![Uno](https://i.imgur.com/OqPyWbbl.jpg)
+
+A 1-key, in-USB "board" for the lulz
+
+* Keyboard Maintainer: [Snipeye](https://github.com/Snipeye)
+* Hardware Availability: [keyhive.xyz](https://keyhive.xyz/shop/uno-single-key-keyboard)
+
+There are two revisions of Uno. If your Uno supports a rotary encoder, use rev2.
+If it *does not* support a rotary encoder, use rev1. The following examples use
+`rev2` — be sure to change this if you are using `rev1`.
+
+Make example for this keyboard (after setting up your build environment; make
+sure to change `rev2` to your Uno's version):
+
+    make keyhive/uno/rev2:default
+
+Flashing example for this keyboard (change `rev2` to `rev1` if needed):
+
+    make keyhive/uno/rev2:default:flash
+
+If you prefer to use the `qmk` tool:
+
+    qmk compile -kb keyhive/uno/rev2 -km default
+
+Create your own keymap with:
+
+    qmk new-keymap -kb keyhive/uno/rev2
+
+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).
+
+### Credits
++ Everything by Snipeye