fix(tools): allow position 0 in create-project script (freeCodeCamp#64247)

Author: bigfatbird

tools/challenge-helper-scripts/create-project.ts

@@ -86,7 +86,8 @@ async function createProject(projectArgs: CreateProjectArgs) {
     }
     void updateChapterModuleSuperblockStructure(
       projectArgs.block,
-      { order: position, chapter, module },
+      // Convert human-friendly (1-based) position to 0-based index for insertion.
+      { order: position - 1, chapter, module },
       superblockFilename
     );
   } else {