Add garbage collection to pin rm

[AquiGorka]

Add the method unlink to the files component.

I have read the discussiones (here & here) and understand files are not deleted from the network (if another peer has pinned them, then the files can still be distributed).

We are working on a web project where we add files to the network and we wanted to remove the files to clear some space locally. With this method the files will be unlinked locally.

[daviddias]

Thank you for formally making the proposal. It just dawned in my mind that what you are looking for is the Pin API and effectively a GC execution. I believe you bring a good point here, having an unlink that does unpin + gc just for that file tree might be useful.

[alanshaw]

@daviddias hah, I literally just suggested the same thing over at #1101 (comment)

@Stebalien what do you think of this proposal? TLDR; add an option to pin rm to immediately garbage collect the unpinned data.

@AquiGorka would you be interested in working on a feature like this?

[AquiGorka]

@alanshaw interested? hell yeah! but I cannot commit to it :( - too much on my plate currently.

[alanshaw]

No worries, thanks for letting us know :)

[achingbrain]

js-ipfs is being deprecated in favor of Helia. You can #4336 and read the migration guide.

This is not implemented in Helia directly, but garbage collection is much, much, (much) faster than in js-IPFS so it's not such a huge deal to run this after removing pins.

This could be an option though, please open an issue against Helia if it would still be useful.