Add Djinn. (#17382)

* Add Djinn.

* Review comments.

* Further cleanup.

keyboards/tzarc/djinn/graphics/thintel15.qff.h

@@ -0,0 +1,11 @@
+// Copyright 2022 QMK -- generated source code only, font retains original copyright
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// This file was auto-generated by `qmk painter-convert-font-image -i thintel15.png -f mono2`
+
+#pragma once
+
+#include <qp.h>
+
+extern const uint32_t font_thintel15_length;
+extern const uint8_t  font_thintel15[966];