notionConfig file and Concurrent Vault Uploads

[zedeff19]

Hi there! 👋

I’ve made a couple of improvements that I think will make the project easier to maintain and a bit faster to use:

Central Notion Config:
I added a notionConfig.ts file at the base of the project. This lets you set the Notion API version in one place and use it wherever you need it (right now, it’s used in notion.ts). This should make it easier to update the API version in the future without hunting through the code.

Faster Vault Uploads:
I updated the vault uploading process to use Promise.all() for concurrent uploads. This means the whole vault can be uploaded in parallel instead of one file at a time, which should make things noticeably quicker, especially for larger vaults.

Let me know if you have any questions or if there’s anything you’d like me to tweak!
Thanks for your work on this project—I’m excited to contribute.