refactor: add flow and upload flow functionality

[lucaseduoli]

• Adds Add Flow and Upload Flow hooks
• Uses those hooks in all of the linked components
• Adds helper upload functions
• Handles various errors relating to file uploads, making it more generic

[github-actions]

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_{Last Modified at 05 Aug 24 18:01 UTC}

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[anovazzi1]

ran tests locally, failed at DragAndDrop,folders,generalBugs-shard-4

[anovazzi1]

LGTM