(build 0.5) Diplomacy and Agreements rework — Once Upon The Universe Steam update #1328988

That one took longer than expected. Some advanced diplomatic pacts are now included but alliances are not part of this build yet. The system may still need some balancing since the sheer number of scenarios and possible diplomatic modifier combinations is quite extensive. Feedback is more than welcome! :) Civilizations now use a full diplomatic relation score from -100 to 100, shaped by border pressure, past wars, resource needs, ideological similarity, aggression, trade history and shared Creator interpretation. Long-term trade now builds lasting diplomatic goodwill, which gradually fades when trade between civilizations ends. Civilizations can now form non-aggression and migration pacts, exchange population through migration agreements, and enter enforced truces after wars. Civilizations require hostile relations before declaring war, with the likelihood of war increasing as relations ...