- Renamed `requireMinimumTerm` to `reqMinimumTreatyTerm` for consistency in naming conventions.
- Introduced `battleGroundCity` constraint to encapsulate logic for checking if a city is in a war zone.
- Added `hasRouteToDestCity` constraint to validate city accessibility based on distance and resource requirements.
- Replaced `alwaysFail` with `denyWithReason` for better error handling in action definitions.
- Implemented `reqEnvValue` for environment value checks with comparison operators.
- Enhanced nation constraints with `reqNationValue` and `reqDestNationValue` for flexible value comparisons.
- Added `wanderingNation` constraint to check if a nation is classified as wandering.
- Improved general constraints with `reqGeneralValue` for dynamic value checks.
- Updated various action definitions to utilize new constraints for better maintainability and readability.
- Implemented various constraints for city management including occupied, supplied, and capacity checks.
- Added diplomacy constraints to manage relationships between nations.
- Introduced general constraints to validate general states and resources.
- Created helper functions for reading entities and resolving IDs.
- Enhanced the overall logic for managing game state and constraints.
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