Added cache to the number of cultures

I18N Commander/Processor/AppSettings.cs

@@ -212,9 +212,15 @@ public static class AppSettings
     #region Translation Settings
 
     #region Number of cultures
+    
+    private static int CACHE_NUMBER_OF_CULTURES = -1;
 
     public static async Task<int> GetNumberCultures()
     {
+        // When possible, use the cache:
+        if (CACHE_NUMBER_OF_CULTURES > -1)
+            return CACHE_NUMBER_OF_CULTURES;
+        
         // Get the database:
         await using var db = ProcessorMeta.ServiceProvider.GetRequiredService<DataContext>();
         
@@ -223,8 +229,12 @@ public static class AppSettings
         
         // We have at least one default culture:
         if(count == 0)
+        {
+            CACHE_NUMBER_OF_CULTURES = 1;
             return 1;
+        }
 
+        CACHE_NUMBER_OF_CULTURES = count;
         return count;
     }
 
@@ -291,6 +301,10 @@ public static class AppSettings
             
             await db.Settings.AddAsync(setting);
             await db.SaveChangesAsync();
+            
+            // Update the number of cultures cache:
+            if(CACHE_NUMBER_OF_CULTURES > -1)
+                CACHE_NUMBER_OF_CULTURES++;
         }
     }