Keyboard: Move Bathroom Epiphany boards into its own directory (#3936)

* make bpiphany directory with simple readme file

* move unloved_bastard to bpiphany directory

* move frosty_flake to bpiphany directory

* move pegasushoof to bpiphany directory

* move tiger_lily to bpiphany directory

* add a little more info to readme

* move kitten_paw to bpiphany directory

* update make instructions

* update intro text

* add missing routines to matrix.c of unloved_bastard

* add missing routines

1 files changed, 18 insertions, 0 deletions

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+# My personal keymap for the Kitten Paw controller
+
+This keymap only works correctly when you have your OS configured with a German keymap. Use the keymap however you like. It's most likely a living thing that will never be quite finished.
+
+## Description of the layers
+Layer 0 (DEFAULT) works just like you would expect a keyboard to work, mostly, except:
+Caps Lock switches to the mouse layer, RGUI and APP are switches to the programming layer and media layer.
+Mouse and programming layer switches can be held or double-tapped to lock.
+Holding space switches to the MISC layer where I currently accumulate useful shortcuts.
+Tapping left and right Shift, Ctrl and Alt will send (), [] and {} respectively.
+
+Layers 1 and 2 (PROG1 and PROG2) emulate the US layout while still using a German OS keymap setting. I was annoyed of having to change the OS settings every time I wanted to use the US layout for coding, so I made these layers to behave just like the US layout even though the OS still uses German. The shift keys were a bit tricky, I had to use them as MO(PROG2) switches, so to get the actual expected behavior I enable LSFT for almost every keypress on PROG2 in ```process_record_user```. Since the shift keys are MO() function keys, they do not print () at the moment, which sucks. I'm working on it.
+
+Layer 3 (MEDIA) just has a couple of media keys on it, mainly around the cursor keys and nav key cluster.
+
+Layers 4 and 5 (MOUSE1 and MOUSE2) are mouse layers. Move the cursor using ESDF, scroll using HJKL, Space for left click, N and M for right and middle click. There's more, look at the keymap.
+
+Layer 6 is a layer I don't have a good name for, so I call it MISC. You'll find cursor keys at ESDF, other navigation keys around the HJKL cluster and F12 to F24 on the F-keys. For now.
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