[Keymap] ANAVI Macro Pad 2 add Skype keymap (#12664)

This keymap for ANAVI Macro Pad 2 contains a couple of Skype
shortcuts for MS Windows and GNU/Linux distributions:

- Ctrl+M: Mute/unmute microphone
- Ctrl+Shift+K: Start/stop camera

Signed-off-by: Leon Anavi <leon@anavi.org>

keyboards/anavi/macropad2/keymaps/skype/keymap.c

@@ -0,0 +1,41 @@
+/* Copyright 2021 Leon Anavi <leon@anavi.org>
+ *
+ * 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 QMK_KEYBOARD_H
+
+/*
+ * The keymap contains the following shortcuts for Skype on
+ * MS Windows and GNU/Linux distributions:
+ *
+ * Ctrl+M: Mute/unmute microphone
+ * Ctrl+Shift+K: Start/stop camera
+ *
+ * NOTE: Mac users should change the shortcut to toggle the mic
+ * to Command+Shift+M, for example KC_LGUI(LSFT(KC_M))
+ */
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [0] = LAYOUT(
+    LCTL(KC_M),  LCTL(LSFT(KC_K))
+  )
+};
+
+const uint16_t PROGMEM test_combo[] = {LCTL(KC_M), LCTL(LSFT(KC_K)), COMBO_END};
+combo_t key_combos[COMBO_COUNT] = {COMBO_ACTION(test_combo)};
+
+void process_combo_event(uint16_t combo_index, bool pressed) {
+	backlight_step();
+}

keyboards/anavi/macropad2/keymaps/skype/rules.mk

@@ -0,0 +1 @@
+COMBO_ENABLE = yes