feat: mpris support

Resolves #25.

Completely refactors the MPD module to be the 'music' module. This now supports both MPD and MPRIS with the same UI for both.

BREAKING CHANGE: The `mpd` module has been renamed to `music`. You will need to update the `type` value in your config and add `player_type` to continue using MPD. You will also need to update your styles.

src/clients/music/mod.rs

@@ -0,0 +1,66 @@
+use color_eyre::Result;
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::Duration;
+use tokio::sync::broadcast;
+
+pub mod mpd;
+pub mod mpris;
+
+pub type PlayerUpdate = (Option<Track>, Status);
+
+#[derive(Clone, Debug)]
+pub struct Track {
+    pub title: Option<String>,
+    pub album: Option<String>,
+    pub artist: Option<String>,
+    pub date: Option<String>,
+    pub disc: Option<u64>,
+    pub genre: Option<String>,
+    pub track: Option<u64>,
+    pub cover_path: Option<PathBuf>,
+}
+
+#[derive(Clone, Debug)]
+pub enum PlayerState {
+    Playing,
+    Paused,
+    Stopped,
+}
+
+#[derive(Clone, Debug)]
+pub struct Status {
+    pub state: PlayerState,
+    pub volume_percent: u8,
+    pub duration: Option<Duration>,
+    pub elapsed: Option<Duration>,
+    pub playlist_position: u32,
+    pub playlist_length: u32,
+}
+
+pub trait MusicClient {
+    fn play(&self) -> Result<()>;
+    fn pause(&self) -> Result<()>;
+    fn next(&self) -> Result<()>;
+    fn prev(&self) -> Result<()>;
+
+    fn set_volume_percent(&self, vol: u8) -> Result<()>;
+
+    fn subscribe_change(&self) -> broadcast::Receiver<PlayerUpdate>;
+}
+
+pub enum ClientType<'a> {
+    Mpd { host: &'a str, music_dir: PathBuf },
+    Mpris,
+}
+
+pub async fn get_client(client_type: ClientType<'_>) -> Box<Arc<dyn MusicClient>> {
+    match client_type {
+        ClientType::Mpd { host, music_dir } => Box::new(
+            mpd::get_client(host, music_dir)
+                .await
+                .expect("Failed to connect to MPD client"),
+        ),
+        ClientType::Mpris => Box::new(mpris::get_client()),
+    }
+}