Support large files in filecoin-pin

[BigLep]

Done Criteria

filecoin-pin takes advantage of the functionality implemented in FilOzone/synapse-sdk#110 (when it's ready)

Why Important

Larger file support is a common feedback ittem we've received.

Notes

[BigLep]

During 2025-11-06 FS WG sync it was agreed that we don't need to get this in for M3.5. There is concern about destabilizing our launch. This can be a fast follow, thus I've moved it to the MX milestone.