AI Big Alliances 2.2

• Added an alliance expulsion option to the AI settings available at the start of a game.
• The AI invites multiple countries and expands existing alliances while respecting the size limit.
• When selecting new members, their relations with current allies are checked for compatibility.
• The alliance size limit and the expulsion toggle are saved separately for each game.
• Expulsions are based on persistent hostility rather than random decisions.
• Observation periods, cooldowns between expulsions, and restrictions on rejoining are in place.
• When responding to a call to arms, the AI evaluates the strength of both sides, other conflicts, war preparations, and an estimate of its financial situation. Defense takes priority over offense.
• The new AI refusal to join a war due to insufficient available forces does not worsen relations.
• The usual restrictions involving gold, relations, and friendship with the enemy remain unchanged.
• The built-in war preparation system and the AI's sending of preparation requests have not been reworked.
• Automatic repeat calls to allies for every offensive have not been added.