Integrate boxo as the underlying IPFS & friends library

[10d9e]

Instead of using the myriad of legacy ipfs libraries, EngRes has produced the boxo initiative. This library should be used to replace blockstore, bitswap and all other direct calls to underlying libraries for edge-ur.

Update:
blocked by: ipfs/boxo#291
blocked by: ipfs/go-merkledag#105

Moving to boxo 0.9.0 yeilds the following:

~/Documents/code/edge-ur boxo-wip*
❯ make       
go generate
go build -tags netgo -ldflags="-s -w -X main.Commit=3b0eb73 -X main.Version=v1.0.2-53-g3b0eb73-dirty" -o edge
# github.com/ipfs/go-merkledag
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:26:9: undefined: format.Register
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:27:9: undefined: format.Register
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:28:9: undefined: format.Register
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:30:9: undefined: ipldlegacy.RegisterCodec
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:31:9: undefined: ipldlegacy.RegisterCodec
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:86:16: undefined: ipldlegacy.DecodeNode
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:146:16: undefined: ipldlegacy.DecodeNode
../../../go/pkg/mod/github.com/ipfs/go-merkledag@v0.10.0/merkledag.go:254:23: undefined: ipldlegacy.DecodeNode
make: *** [build] Error 2