feat: support optional pin names (#10261)

client/rpc/pin.go

cmd/ipfs/kubo/init.go

core/commands/dag/import.go

core/commands/pin/pin.go

core/coreapi/block.go

core/coreapi/dag.go

core/coreapi/object.go

core/coreapi/pin.go

core/coreiface/options/pin.go

core/coreiface/pin.go

core/coreunix/add.go

docs/changelogs/v0.26.md

docs/examples/kubo-as-a-library/go.mod

docs/examples/kubo-as-a-library/go.sum

fuse/ipns/common.go

gc/gc.go

gc/gc_test.go

go.mod

go.sum

test/cli/pins_test.go