add Query.IsForced property

When a plugin is processing a query, it can check the `IsForced` property
to decide if the results will be served from cache or not.

Author: JohnTheGr8

Flow.Launcher.Plugin/Query.cs

@@ -29,6 +29,12 @@ public Query(string rawQuery, string search, string[] terms, string[] searchTerm
         /// </summary>
         public string RawQuery { get; internal init; }
 
+        /// <summary>
+        /// Determines whether the query was forced to execute again.
+        /// When this property is true, plugins handling this query should avoid serving cached results.
+        /// </summary>
+        public bool IsForced { get; internal set; } = false;
+
         /// <summary>
         /// Search part of a query.
         /// This will not include action keyword if exclusive plugin gets it, otherwise it should be same as RawQuery.

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
@@ -512,7 +512,7 @@ public void ChangeQueryText(string queryText, bool reQuery = false)
                 }
                 else if (reQuery)
                 {
-                    Query();
+                    Query(reQuery: true);
                 }
                 QueryTextCursorMovedToEnd = true;
             });
@@ -612,11 +612,11 @@ public string PreviewHotkey
 
         #region Query
 
-        public void Query()
+        public void Query(bool reQuery = false)
         {
             if (SelectedIsFromQueryResults())
             {
-                QueryResults();
+                QueryResults(reQuery);
             }
             else if (ContextMenuSelected())
             {
@@ -716,7 +716,7 @@ private void QueryHistory()
 
         private readonly IReadOnlyList<Result> _emptyResult = new List<Result>();
 
-        private async void QueryResults()
+        private async void QueryResults(bool reQuery = false)
         {
             _updateSource?.Cancel();
 
@@ -747,6 +747,8 @@ private async void QueryResults()
             if (currentCancellationToken.IsCancellationRequested)
                 return;
 
+            // Update the query's IsForced property to true if this is a re-query
+            query.IsForced = reQuery;
 
             // handle the exclusiveness of plugin using action keyword
             RemoveOldQueryResults(query);