Add exclude-current action

https://github.com/junegunn/fzf/pull/4231#issuecomment-2646063208

src/options.go

@@ -1605,6 +1605,8 @@ func parseActionList(masked string, original string, prevActions []*action, putA
 			appendAction(actBell)
 		case "exclude":
 			appendAction(actExclude)
+		case "exclude-current":
+			appendAction(actExcludeCurrent)
 		default:
 			t := isExecuteAction(specLower)
 			if t == actIgnore {