[Keyboard] keyboards/anavi: Add ANAVI Macro Pad 2 (#11821)

ANAVI Macro Pad 2 is an open source mini mechanical keyboard with
2 keys and backlit. Powered by ATtiny 85 microcontroller and with
microUSB connector. Designed with KiCad.

Provides the following keymaps for ANAVI Macro Pad 2:

- Default (with a, b and combo to control the LEDs)
- Copy & paste
- Tap dance example with a, b and c
- Mute
- Volume
- Zoom
- Jitsi Meet

Co-authored-by: Drashna Jaelre <drashna@live.com>
Signed-off-by: Leon Anavi <leon@anavi.org>

Co-authored-by: Drashna Jaelre <drashna@live.com>

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

@@ -0,0 +1,30 @@
+/* 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
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [0] = LAYOUT(
+    C(KC_C),  C(KC_V)
+  )
+};
+
+const uint16_t PROGMEM test_combo[] = {C(KC_C), C(KC_V), COMBO_END};
+combo_t key_combos[COMBO_COUNT] = {COMBO_ACTION(test_combo)};
+
+void process_combo_event(uint16_t combo_index, bool pressed) {
+	backlight_step();
+}