add forced invoke scan for clearing cache dir, add forced rescan on pause

MareSynchronos/UI/IntroUI.cs

@@ -226,7 +226,7 @@ namespace MareSynchronos.UI
 
                     if (ImGui.Button("Start Scan##startScan"))
                     {
-                        _fileCacheManager.InvokeScan();
+                        _fileCacheManager.InvokeScan(true);
                     }
                 }
                 else

MareSynchronos/UI/UIShared.cs

@@ -159,6 +159,11 @@ namespace MareSynchronos.UI
             else if (_pluginConfiguration.FileScanPaused)
             {
                 ImGui.Text("File scanner is paused");
+                ImGui.SameLine();
+                if (ImGui.Button("Force Rescan##forcedrescan"))
+                {
+                    _cacheScanner.InvokeScan(true);
+                }
             }
             else
             {
@@ -512,7 +517,7 @@ namespace MareSynchronos.UI
 
         public void RecalculateFileCacheSize()
         {
-            _cacheScanner.InvokeScan();
+            _cacheScanner.InvokeScan(true);
         }
 
         public void DrawParallelScansSetting()