🧐 Motivation
There is already a VestingWallet contract allowing to deploy a vesting contract to a specific beneficiary address. However, when you must create vestings for tens of people, this is too restrictive as you need to deploy a contract per beneficiary, costing a lot of gas and it's hard to manage.

It would be nice to have a multi vesting contract, like the dss-vest of Maker but with better naming and complementary features.

This is really needed for DAOs in general and having an OZ implementation would ease DAO's operational cost and reinforce trust between the DAO and their investors, advisors, contributors, etc.

📝 Details

• Create a MultiVesting contract allowing to create multiple vestings for multiple beneficiaries through the same contract
• Implement all the available feature of the dss-vest
• Add the ability to add or not a manager that can revoke a vesting contract
• If a manager is set, add the possibility for the owner to change the manager

Happy to help if needed!