Refine VoteSkipService warnings and remove redundant announce calls

Updated the warning message in `VoteSkipService` to provide more precise feedback when attempting to vote on an empty queue. Removed an unnecessary `announce` call in `MusicRoutes`'s `resumePlayback` for cleaner and more concise code execution.

src/main/java/me/bobert/netneutrality/http/server/MusicRoutes.java

@@ -221,7 +221,6 @@ public final class MusicRoutes {
     private static void resumePlayback(Supplier<JDA> jdaSupplier, MusicService musicService, Context ctx) {
         MusicManager manager = manager(jdaSupplier, musicService, ctx);
         manager.unpauseTrack();
-        announce(manager, "Resuming current track");
         ctx.json(Map.of("status", "ok", "message", "Resuming current track"));
     }
 
@@ -347,7 +346,7 @@ public final class MusicRoutes {
         MusicManager manager = musicService.get(guild);
         String userId = ctx.pathParam("userId");
 
-        CacheOrFetch.<Member>resolve(
+        CacheOrFetch.resolve(
             ctx,
             () -> guild.getMemberById(userId),
             () -> guild.retrieveMemberById(userId),

src/main/java/me/bobert/netneutrality/music/VoteSkipService.java

@@ -56,7 +56,7 @@ public class VoteSkipService {
 
         TrackInfo info = queueManager.peekHeadOfQueue();
         if (info == null) {
-            return QueueActionResult.warn("Queue is empty");
+            return QueueActionResult.warn("The queue is empty, you can't cast a vote on an empty queue");
         }
 
         // Minus the bot itself