[edit] allow Unicode characters in key search query

Author: i4004

src/EtcdTerminal.App/Screens/KeyBrowseScreen.cs

@@ -168,11 +168,9 @@ private async Task MainLoopAsync()
 				case ConsoleKey.Escape:
 					return;
 				default:
-					var c = keyInfo.KeyChar;
-
-					if (c >= ' ' && c <= '~')
+					if (!char.IsControl(keyInfo.KeyChar))
 					{
-						_searchQuery += c;
+						_searchQuery += keyInfo.KeyChar;
 						ApplyFilter();
 					}
 					break;