anavi/knobs3: Add ANAVI Knobs 3

Add support for ANAVI Knobs 3: an open source programmable mini
mechanical keyboard with 3 rotary encoders and Seeed XIAO RP2040.
This is open source hardware designed with KiCad.

Signed-off-by: Leon Anavi <leon@anavi.org>

boards/anavi/knobs3/code.py

@@ -0,0 +1,24 @@
+import board
+
+from anaviknob import AnaviKnob
+
+from kmk.keys import KC
+from kmk.modules.encoder import EncoderHandler
+
+encoder_handler = EncoderHandler()
+encoder_handler.pins = (
+    (board.D1, board.D2, None, False),
+    (board.D9, board.D10, None, False),
+    (board.D7, board.D8, None, False),
+)
+encoder_handler.map = (
+    ((KC.VOLD, KC.VOLU), (KC.UP, KC.DOWN), (KC.RIGHT, KC.LEFT)),  # base layer
+)
+
+knob = AnaviKnob()
+knob.modules.append(encoder_handler)
+
+knob.keymap = [[KC.MUTE, KC.A, KC.B]]
+
+if __name__ == '__main__':
+    knob.go()