support drain liquidity when dev rugged 60days project

[koo-virtuals]

Note

High Risk
Introduces executor-only functions that can withdraw all liquidity (including setting UniV2 amountAMin/amountBMin to 0), making role assignment/configuration of bondingV2 and REMOVE_LIQUIDITY_ROLE security-critical.

Overview
Adds privileged liquidity drain capabilities for rugged Project60days tokens.

FRouterV2 gains setBondingV2 plus two new EXECUTOR_ROLE-gated operations: drainPrivatePool (empties an FPairV2’s asset+token balances to a recipient and emits PrivatePoolDrained) and drainUniV2Pool (verifies veToken/LP pair matches agentToken+$Virtual, then drains the founder’s full veToken balance via AgentFactoryV6.removeLpLiquidity, emitting UniV2PoolDrained).

To keep state coherent after private-pool drains, FPairV2/IFPairV2 add syncAfterDrain and a Sync event to adjust internal reserves/k without relying on balanceOf, with router-side try/catch for backward compatibility. Interfaces are extended (IAgentFactoryV6.removeLpLiquidity, IAgentVeTokenV2.founder) and a comprehensive test/project60days/drainLiquidity.js suite is added covering success and revert paths.

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