Add Spotify connect (#4)

Not to be merged until the Spotify Connect functionality is added to the
beta.

docs/plugins/spotify-connect.md

@@ -0,0 +1,26 @@
+---
+title: Spotify Connect Plugin
+description: Features and Notes for the Spotify Connect Plugin
+---
+
+# Spotify Connect ![Preview image](../assets/icons/spotify-connect-icon.png){ align=right }
+
+Music Assistant has the ability to add [Spotify Connect](https://connect.spotify.com/) support to any MA player.
+
+!!! note
+    This plugin is still in an early stage of development. Functionality is limited and bugs may occur
+
+## Features
+
+- Any MA player can be exposed including groups
+
+## Configuration
+
+To make each player appear as a Spotify Connect target in the Spotify app, the Spotify Connect provider needs to be added individually for each player in the Plugins section
+
+## Known Issues / Notes
+
+- To use Spotify Connect, all devices must be connected to the same network. Refer to the [Spotify Connect Support Article](https://support.spotify.com/en/article/spotify-connect/) for more information
+- If the device does not natively support announcements then playback will be interrupted if an announcement is sent to a player that is being streamed to via Spotify Connect. Currently this means that, announcements will only work on the Voice PE devices (and derivatives) and Sonos S2 devices
+- The MA volume normalization functionality is only available in dynamic mode
+- Due to the universal, buffered nature of forwarding the Spotify Connect audio stream to MA players, there will be a delay (between 2 and 20 seconds) in sending a command from the Spotify app. Metadata can also be ahead of time

mkdocs.yml

@@ -49,16 +49,18 @@ nav:
       - TuneIn: music-providers/tunein.md
       - YouTube Music: music-providers/youtube-music.md
   - Player Providers:
-      - player-support/index.md
-      - AirPlay: player-support/airplay.md
-      - Bluesound: player-support/bluesound.md
-      - DLNA: player-support/dlna.md
-      - Fully Kiosk: player-support/fully-kiosk.md
-      - Google Cast: player-support/google-cast.md
-      - Home Assistant: player-support/ha.md
-      - Slimproto: player-support/slimproto.md
-      - Snapcast: player-support/snapcast.md
-      - Sonos: player-support/sonos.md
+    - player-support/index.md
+    - AirPlay: player-support/airplay.md
+    - Bluesound: player-support/bluesound.md
+    - DLNA: player-support/dlna.md
+    - Fully Kiosk: player-support/fully-kiosk.md
+    - Google Cast: player-support/google-cast.md
+    - Home Assistant: player-support/ha.md
+    - Slimproto: player-support/slimproto.md
+    - Snapcast: player-support/snapcast.md
+    - Sonos: player-support/sonos.md
+  - Plugins:
+    - plugins/spotify-connect.md
   - Support: support.md
   - I Want to Help / Donate:
       - help/index.md