[Keyboard] New Keyboard: handwired/jtallbean/split_65 (#8275)

* New keyboard: split_65

* Updated readme

* Update with requested changes

* Add writePinLow to prevent flickering

* Renamed LAYOUT to LAYOUT_all

keyboards/handwired/jtallbean/split_65/split_65.c

@@ -0,0 +1,43 @@
+/* Copyright 2020 jtallbean
+ *
+ * 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 "split_65.h"
+
+// Optional override functions below.
+// You can leave any or all of these undefined.
+// These are only required if you want to perform custom actions.
+
+void matrix_init_kb(void) {
+    // put your keyboard start-up code here
+    // runs once when the firmware starts up
+
+    // Set our LED pins as output
+    setPinOutput(B0);
+    writePinLow(B0);
+
+    matrix_init_user();
+}
+
+bool led_update_kb(led_t led_state) {
+    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+
+    bool res = led_update_user(led_state);
+    if(res) {
+        // writePin sets the pin high for 1 and low for 0.
+        writePin(B0, led_state.caps_lock);
+    }
+    return res;
+}