[Keyboard] Add sowbug/68keys and sowbug/ansi_tkl (#11589)

keyboards/sowbug/68keys/readme.md

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+# 68keys
+
+A 68-key keyboard with per-key RGB, Kailh hotswap sockets, and USB-C. Uses Blue Pill.
+
+## History
+
+This keyboard was inspired by the [68keys.io](https://68keys.io/) keyboard. The
+68keys keyboard has a similar layout to the
+[MagicForce 68](https://www.amazon.com/Qisan-Mechanical-Keyboard-68-Keys-Magicforce/dp/B01E8KO2B0).
+[di0ib](https://github.com/di0ib) did a
+[replacement PCB](https://github.com/di0ib/tmk_keyboard/tree/master/keyboard/mf68)
+for the Magicforce 68.
+
+I love the Magicforce 68, but wanted a few changes. As a colossally
+disproportionate response to this challenge, I created
+[a utility](https://github.com/sowbug/keycad/) that generates PCBs from
+arbitrary KLE JSON files, and used it to create this keyboard.
+
+## A note about backlighting
+
+I wanted my per-key RGB keyboard to have a dim backlight on all keys, but didn't
+want to sacrifice cool RGB matrix effects to have it. So I wrote up
+[a QMK patch](https://github.com/sowbug/qmk_firmware/commit/f7f859ceeefde40e639cfc75044af477504d30f8)
+that treats RGB(0, 0, 0) as eligible for backlighting. Unfortunately the QMK
+maintainers weren't interested (actually, now that I look back, I didn't submit
+a pull request, but rather discussed it in a chat room), so it's not upstreamed.
+Thus you'll have to add that patch (and
+[this](https://github.com/sowbug/qmk_firmware/commit/ff17800ef4a9cba59d754c72720d6877edb8fbb9))
+to your copy of QMK and then enable it in config.h and rules.mk.
+
+## Building and flashing
+
+`qmk flash -kb sowbug/68keys -km default`