[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/readme.md

@@ -0,0 +1,49 @@
+# ANAVI Macro Pad 8
+
+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.
+
+* Keyboard Maintainer: [Leon Anavi](https://github.com/leon-anavi)
+* Hardware Supported: ANAVI Macro Pad 2
+* Hardware Availability: [PCB Files](https://github.com/AnaviTechnology/anavi-macro-pad-2)
+
+**Note**: Due to limited firmware space, a _**lot**_ of features have to be disabled to get a functioning QMK based keyboard.
+
+Make example for this keyboard (after setting up your build environment):
+
+    make anavi/macropad2:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Flashing
+### Prerequisites
+
+```bash
+git clone https://github.com/micronucleus/micronucleus.git
+cd micronucleus/commandline/
+sudo make install
+```
+
+On GNU/Linux distributions, you will need proper privileges to access the MCU. You can either use `sudo` when flashing firmware, or place [these files](https://github.com/micronucleus/micronucleus/blob/master/commandline/49-micronucleus.rules) in /etc/udev/rules.d/. Once added run the following:
+
+```bash
+sudo udevadm control --reload-rules
+sudo udevadm trigger
+```
+
+### Instructions
+
+* Run one of the following commands:
+
+```bash
+make anavi/macropad2:default:flash
+
+# or directly with...
+micronucleus --run <firmware.hex>
+```
+
+* Plug ANAVI Macro Pad 2 to the USB port and the flashing procedure should start
+
+### Recovery
+
+* [Original Firmware](https://github.com/AnaviTechnology/anavi-macro-pad-2/tree/main/bootloader)
+* [Bootloader Repair](https://digistump.com/wiki/digispark/tutorials/proisp)