Add warnings in remedy and remove QueryUserFile (not very good currently)

src/text_editor/plugin_remedybg.cpp

@@ -2116,6 +2116,9 @@ bool RDBG_InitConnection(mco_coro *co, bool create_session = true) {
             ResolvedOpen res = ResolveOpen(ctx->arena, window, BinaryUnderDebug, ResolveOpenMeta_DontError | ResolveOpenMeta_DontExec);
             if (res.kind == OpenKind_Goto) {
                 file = Intern(&GlobalInternTable, res.path);
+            } else {
+                ReportErrorf("Failed to find the executable pointer by BinaryUnderDebug: %S", BinaryUnderDebug);
+                return false;
             }
         }
 
@@ -2130,7 +2133,8 @@ bool RDBG_InitConnection(mco_coro *co, bool create_session = true) {
         }
 
         if (file.len == 0) {
-            file = QueryUserFile(co);
+            ReportWarningf("Couldn't find neither .rdbg file, nor use the BinaryUnderDebug variable to locate the binary");
+            return false;
         }
     }