refactor: fixed security.yml and improved play/pause

- New `--media-pause-icon` option
- Unified play/pause button action
- Move MPRIS lookup to spawn_blocking
- Speed up security CI with cargo-binstall

src/config.rs

@@ -127,6 +127,9 @@ pub struct Config {
     #[arg(long)]
     pub media_play_icon: Option<String>,
 
+    #[arg(long)]
+    pub media_pause_icon: Option<String>,
+
     #[arg(long)]
     pub media_next_icon: Option<String>,
 
@@ -251,6 +254,12 @@ impl Config {
                         }
                     }
 
+                    if !is_cli("media_pause_icon") {
+                        if let Some(toml::Value::String(s)) = table.get("media_pause_icon") {
+                            config.media_pause_icon = Some(s.clone());
+                        }
+                    }
+
                     if !is_cli("media_next_icon") {
                         if let Some(toml::Value::String(s)) = table.get("media_next_icon") {
                             config.media_next_icon = Some(s.clone());