Rewards V2 implementation

[dmitriy-woof-software]

• Preliminary CometRewardsV2 functionality with MerkleProof

• feat: restructorized contract storage, fixed all compilaion errors

• fix: multiple assets compaign

• fix: compaigns functionality

• feat: Add finishAccrued and startAccrued bug fix

• feat: claimed calculation fix

• feat: claimed calculation fix

• feat: add CometRewards V1 interaction

• wip: tests and new contract version

• wip: contract update with more tests

• wip: new contract update and revert changes to CometRewards

• wip: cover most of the contract and fix some bugs

• wip: coverage improvement

• feat: complited contract changes and test coverage

• feat: remove package-lock

• feat: set yarn file to the main branch version

• feat: update yarn file