Introduce Auth module

[ishantiw]

LIP

• Research Forum: Introduce auth module

Description

Create an auth module following the updated modular on-chain architecture. The auth module is responsible for handling and verifying nonces and for transaction signature validation.

Tasks

• Bootstrap auth module with class definition, schema and constants #6732
• Move all the util functions from old keys module #6733
• Implement auth module verifyTransaction hook #6734
• Implement auth module afterTransactionExecution hook #6735
• Add API for auth module #6737
• Add command registerMultisignatureGroup #6736
• Add Endpoint for auth module #6738
• Implement afterGenesisBlockExecute hook for Auth module #6921