createFileStructure does not pass file/folder intent to fsOperation.extend stat #1745

Problem:
helpers.createFileStructure() passes isFile only at the top-level call. Inside its loop, it calls:

if (!(await fsOperation(newPath).exists())) { ... }

• exists() is called on newPath
• createFile() / createDirectory() is called on the parent path (currentUri)
• stat() inside fsOperation.extend() cannot know whether the path is intended to be a file or folder.

Impact:

• Files inside folders are treated as directories.
• Creating folders in the root may fail.
• Virtual paths cannot be correctly typed (isFile / isDirectory) before creation.

Root cause:
isFile is never passed to fsOperation(newPath).exists() or stat().

Proposed solution:

• Expose the isFile intent to fsOperation.extend() / stat() calls inside the loop.
• Or provide a context/hook so FS extensions can detect the user’s intent.

Notes:

• Affects virtual file systems (paths not tied to a real filesystem).
• Current workarounds require storing isFile externally, which is complex.