Quests covenant

[Corantin]

• Redact a Quests covenant (take inspiration from 1hive covenant : https://ipfs.io/ipfs//QmfWppqC55Xc7PU48vei2XvVAuH76z2rNFF7JMUhjVM5xV)
• Put it in our repo
• Make a script to push it to ipfs using ipfs.js
• Add a use terms accept checkbox in create quest modal with the link of the ipfs
• Change config of xdai GovernQueue through gnosis-safe to put the hexa link of ipfs as rules