feat: Add endpoint to upload documents to a specified folder (#3276)

* feat: Add endpoint to retrieve documents by folder name

* isWithin Check on path to prevent path traversal

* feat: Add endpoint to upload documents to a specified folder

* refactor upload to folder endpoint + update jsdoc for swagger

* linting

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Co-authored-by: timothycarambat <rambat1010@gmail.com>
Co-authored-by: shatfield4 <seanhatfield5@gmail.com>