feat(shields): Add Kyria Rev2 shield.

* New matrix pin selections.
* New encoder pins.

app/boards/shields/kyria/kyria_rev2.zmk.yml

@@ -0,0 +1,15 @@
+file_format: "1"
+id: kyria_rev2
+name: Kyria Rev2
+type: shield
+url: https://splitkb.com/products/kyria-pcb-kit
+requires: [pro_micro]
+exposes: [i2c_oled]
+features:
+  - keys
+  - display
+  - encoder
+  - underglow
+siblings:
+  - kyria_left
+  - kyria_right