[Keyboard] Adds support for BM16S keyboard (#5659)

* Added support for BM16S keyboard.

* Update keyboards/bm16s/bm16s.h

Co-Authored-By: bontakun <ben@bontakun.net>

* Update keyboards/bm16s/bm16s.h

Co-Authored-By: bontakun <ben@bontakun.net>

* Cleaned up a bunch of unneeded stuff.

* Made layout name match.

* Changed rules file to have correct bootloader and indention. Updated readme to reflect availability on krepublic. Updated keymap to have more obvious RGB controls.

* Removed unnecessary file.

* Fixed grammar in readme.

Co-Authored-By: bontakun <ben@bontakun.net>

* Migrated to autogenerated layout config, without issue.

* Renamed LAYOUT to match community standards.

keyboards/bm16s/keymaps/media/keymap.c

@@ -0,0 +1,20 @@
+#include QMK_KEYBOARD_H
+
+#define RGB_BRU RGB_VAI
+#define RGB_BRD RGB_VAD
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+	[0] = LAYOUT_ortho_4x4(
+		KC_BRIU, _______, _______, KC_VOLU, \
+		KC_BRID, _______, _______, KC_VOLD, \
+		_______, _______, _______, KC_MUTE, \
+		KC_MPRV, KC_MPLY, KC_MNXT, MO(1)    \
+	),
+	[1] = LAYOUT_ortho_4x4(
+		RESET,    _______, _______, _______, \
+		RGB_SPD,  RGB_BRU, RGB_SPI, _______, \
+		RGB_RMOD, RGB_BRD, RGB_MOD, _______, \
+		RGB_TOG,  _______, _______, _______  \
+	),
+};