[issues/306] Added support for cheat code 'vm.wrap' in PVM mode

[filip-parity]

TL;DR

This pull request implements vm.warp cheatcode support in polkadot-foundry's PVM mode, following the same pattern as existing cheat codes like vm.roll and vm.setNonce.

Changes

• Added warpCall handler in revive-strategy/src/cheatcodes/mod.rs
• Implemented set_timestamp function that updates both EVM context and pallet-revive runtime
• Added comprehensive test in forge/tests/cli/revive_vm.rs to verify PVM integration
• Exported Timestamp from revive-env/src/lib.rs for runtime access

How it works

When vm.warp(newTimestamp) is called in PVM mode it:

• Updates EVM context: ecx.env.block.timestamp = newTimestamp
• Updates pallet-revive runtime: Timestamp::set_timestamp(newTimestamp)
• Ensures Solidity block.timestamp reflects the change in both execution contexts

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Closes #306

[pkhry]

LGTM, barring the comments about tracing in output in private.