[SG] Adds Group Notifications

[LaimeJesus]

related #162

Description

This PR adds the following changes:

• Adds schemas for new group events data
  • group creation: group address, group name, user safe address (creator)
  • group member added/removed: group address, user safe address (member)
  • group minted: group address, mint amount, fee amount, user safe address (receiver)
• Adds Group event Data in Notification Schema
• Adds Handlers to generate notifications with new events

How to test

See deployed SG: https://thegraph.com/hosted-service/subgraph/laimejesus/shisus-crc-local

Group Event Data

{
  groupCreations {
    id,
    group,
    name,
    creator
  }
  
  groupAddMembers {
    id,
    user
  }
  
  groupRemoveMembers {
    id,
    user
  }

  groupMints {
    id,
    amount,
    receiver,
    mintFee
  }
}

Notifcations

{
  notifications(where: {
    safe: "0xb77d3948693b6dee0f85184db515ce4910c21fe9"
  },
    orderBy: time,
    orderDirection: desc) {
    id
    transactionHash
    safeAddress
    type
    time
    trust {
      user
      canSendTo
      limitPercentage
    }
    transfer {
      from
      to
      amount
    }
    hubTransfer {
      from
      to
      amount
    }
    ownership {
      adds
      removes
    }
    groupCreation {
      id
      group
      name
      creator
    }
    groupAddMember {
      id
      user
    }
    groupRemoveMember {
      id
      user
    }
    groupMint {
      id
      amount
      receiver
      mintFee
    }
  }
}

Example