fix!: make net_protocol feature work without rpc

[dignifiedquire]

also removes rpc from the default feature flags to reduce dependency load

[github-actions]

Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh-blobs/pr/27/docs/iroh_blobs/

Last updated: 2024-12-04T13:10:11Z

[rklaehn]

Not sure I like rpc not being on by default. The standard way to use blobs should be via the (mem or quic) rpc client, which of course requires rpc.

But we can switch it back on later I guess.

    "dep:quic-rpc",
    "dep:quic-rpc-derive",
    "dep:nested_enum_utils",
    "dep:strum",
    "dep:futures-util",
    "dep:ref-cast", // ?
    "dep:portable-atomic", // ?
    "dep:walkdir", // this one we might get rid of
    "downloader",