Add unanimous TD-out voting

[calcallsalot]

Summary

• Add a unanimous TD-out checkmark for eligible even-player games after two failed governments.
• Let players rescind their TD-out vote until every living player agrees.
• Continue top-decking policies without elections or presidential powers until a team wins.

Why

This shortens games that have reached an agreed-upon, repetitive top-deck finish while preserving a unanimous opt-in.

Validation

• Targeted Jest suite: 50 tests passed.
• Biome and oxlint passed.
• Repository pre-commit lint passed.