Always treat queries that start with ? as search queries

YoutubeDownloader.Core/Resolving/QueryResolver.cs

@@ -111,11 +111,17 @@ private async Task<QueryResult> ResolveSearchAsync(
     public async Task<QueryResult> ResolveAsync(
         string query,
         CancellationToken cancellationToken = default
-    ) =>
-        await TryResolvePlaylistAsync(query, cancellationToken)
-        ?? await TryResolveVideoAsync(query, cancellationToken)
-        ?? await TryResolveChannelAsync(query, cancellationToken)
-        ?? await ResolveSearchAsync(query, cancellationToken);
+    )
+    {
+        // If the query starts with a question mark, it's always treated as a search query
+        if (query.StartsWith('?'))
+            return await ResolveSearchAsync(query[1..], cancellationToken);
+
+        return await TryResolvePlaylistAsync(query, cancellationToken)
+            ?? await TryResolveVideoAsync(query, cancellationToken)
+            ?? await TryResolveChannelAsync(query, cancellationToken)
+            ?? await ResolveSearchAsync(query, cancellationToken);
+    }
 
     public async Task<QueryResult> ResolveAsync(
         IReadOnlyList<string> queries,

YoutubeDownloader/Views/Components/DashboardView.axaml

@@ -27,6 +27,7 @@
                         ScrollViewer.HorizontalScrollBarVisibility="Hidden"
                         Text="{Binding Query}"
                         Theme="{DynamicResource SoloTextBox}"
+                        ToolTip.Tip="Any valid YouTube URL or ID is accepted. Prepend a question mark (?) to perform search by text."
                         Watermark="URL or search query">
                         <TextBox.InnerLeftContent>
                             <materialIcons:MaterialIcon