[Keyboard] Add Cassini keyboard (#16522)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: yiancar <yiancar@gmail.com>

keyboards/protozoa/cassini/cassini.c

@@ -0,0 +1,21 @@
+/* Copyright 2022 Yiancar-Designs
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+ #include "cassini.h"
+
+void led_init_ports(void) {
+    // Set our LED pins as open drain outputs
+    palSetLineMode(LED_CAPS_LOCK_PIN, PAL_MODE_OUTPUT_OPENDRAIN);
+}