[VPD-301]: VIP for liquidation improvements and updating repayment logic

[Debugger022]

Description

This VIP introduces enhanced liquidation mechanisms to the Venus Core Pool on BNB Chain Testnet, implementing the following improvements:

• Liquidation Threshold: Adds the concept of liquidation threshold to the Core Pool, enabling more granular control over when positions become eligible for liquidation
• Dynamic Liquidation Incentive: Implements dynamic liquidation incentives that adjust based on market conditions and account health factors
• Dynamic Close Factor: Introduces dynamic close factors that vary based on borrower position health
• Maximum Liquidation Incentive: Defines maximum liquidation incentive limits per seized asset to protect borrowers from excessive liquidation penalties

Contract Upgrades

This VIP will perform the following:

• Upgrade Comptroller (Unitroller) to new Diamond implementation with updated facets
• Deploy and configure the new Liquidation Manager contract
• Upgrade VAI Controller with updated liquidation logic
• Upgrade Liquidator contract to support dynamic incentives
• Upgrade all Core Pool vTokens to new implementation
• Update Comptroller Lens for new data structures
• Configure new access controls for liquidation parameters