feat(avd): add avd plugin

plugins/avd/README.md

@@ -0,0 +1,46 @@
+# avd plugin
+
+The avd plugin provides aliases for Android Virtual Device / Android
+Emulator commands.
+
+To use it, add avd to the plugins array of your zshrc file:
+
+```zsh
+plugins=(... avd)
+```
+
+## Requirements
+
+In order to make this work, you will need to have the Android `emulator`
+tool set up in your path. This plugin will try to find that tool in
+`$ANDROID_HOME` as a last resort, however it will make it slower and may
+not work as expected.
+
+## Functions
+
+- `avds` - Lists all the AVDs
+- `avd [-v] <n>` - Launches n-th AVD from the AVDs list printed by
+  `avds`
+  - `-v` will let stdout and stderr print to the console which is
+    disabled by default to avoid the clutter
+- `find_emulator` - Tries to find the `emulator` tool either in your
+  path or `$ANDROID_HOME` directory
+
+## Aliases
+
+- `emus` - Same as `avds`
+- `emu [-v] <n>` - Same as `avd [-v] <n>`
+
+## Exemplary usage:
+```
+~/
+> avds
+Pixel_2_API_30
+Samsung_Tab_A_2019_API_25
+Samsung_Tab_A_2019_API_29
+
+~/
+> avd 2
+Starting emulator: Samsung_Tab_A_2019_API_25
+[3] 33463
+```