feat: add support for network field in follows

[wa0x6e]

Fixes snapshot-labs/snapshot-sequencer#341

This PR add support for the new network field added to follows in snapshot-labs/snapshot-sequencer#342

• Add network and network_in filter to follows
• Return the network field in follows

As we only have Space data for followed spaced of type s, all the spaces from other network will only return an id, with all other fields blank.

Tests

{
  follows(where: {network: "s"}, first: 10) {
   id
    space {
      id 
      name
      about
      turbo
      flagged
      verified
    }
    network
  }
}

[ChaituVR]

tAck