Re-Add ability to handle/play tracks (#1468)

* re-add support to play a set of tracks

* connect: reduce some cloning

* connect: derive clone for LoadRequest

* apply review, improve function naming

* clippy fix

protocol/src/impl_trait/context.rs

@@ -1,4 +1,4 @@
-use crate::context::Context;
+use crate::{context::Context, context_page::ContextPage, context_track::ContextTrack};
 use protobuf::Message;
 use std::hash::{Hash, Hasher};
 
@@ -11,3 +11,27 @@ impl Hash for Context {
 }
 
 impl Eq for Context {}
+
+impl From<Vec<String>> for ContextPage {
+    fn from(value: Vec<String>) -> Self {
+        ContextPage {
+            tracks: value
+                .into_iter()
+                .map(|uri| ContextTrack {
+                    uri: Some(uri),
+                    ..Default::default()
+                })
+                .collect(),
+            ..Default::default()
+        }
+    }
+}
+
+impl From<Vec<ContextTrack>> for ContextPage {
+    fn from(tracks: Vec<ContextTrack>) -> Self {
+        ContextPage {
+            tracks,
+            ..Default::default()
+        }
+    }
+}