Deprecate -bs-super-errors flag for backward compat (#6243)

Author: mununki

CHANGELOG.md

@@ -14,7 +14,7 @@
 
 #### :boom: Breaking Change
 
-- `-bs-super-errors` flag has been removed along with Super_errors. https://github.com/rescript-lang/rescript-compiler/pull/6199
+- `-bs-super-errors` flag has been deprecated along with Super_errors. https://github.com/rescript-lang/rescript-compiler/pull/6243
 
 #### :bug: Bug Fix
 

jscomp/bsc/rescript_compiler_main.ml

@@ -292,6 +292,9 @@ let buckle_script_flags : (string * Bsc_args.spec * string) array =
 
     (******************************************************************************)
 
+    "-bs-super-errors", unit_call (fun _ -> ()),
+    "*deprecated* Better error message combined with other tools ";
+
     "-unboxed-types", set Clflags.unboxed_types,
     "*internal* Unannotated unboxable types will be unboxed";