Author creation + permissions

[jaimeturon]

Hey,

I recently took a fresh cut of this repo - thanks so much for sharing, I'm pretty excited about this new set up and looking forward to leveraging it as much as possible. While running _scripts/obsidian_util.py, I realised a couple of things:

1. I wonder if in create_authors, line 79 shud be os.path.join(vault_path, "Authors", f{author_tag}.md") rather than the current one, which adds ".md" to the path.
2. Second thing is that my python scripts was missing permissions to write files in that folder ("Authors"). Wondering if adding os.chmod(os.path.join(vault_path, "Authors"), 0o777) might be worth it to address this issue on the fly.

Hope this helps.