Refactor out IPFS class from API/FileController.ts

[kennylavender]

API/FileController currently contains its a function that uploads to IPFS, it should be extracted how the other modules have a IPFS class.

[lautarodragan]

If possible and not too much extra work, it'd be great to stop creating individual versions of IPFS Clients for each module and just have one in Helpers or the separate project you had started. Shouldn't be a ton of work and the benefit would be pretty big.

We could use it in the integration tests, too.