Add Situation Feature from Stellaris

[AutumnPizazz]

Before creating

• [X] This is NOT a gameplay feature from Civ VI, BNW, or outside - see Roadmap
• [X] This is NOT a gameplay feature from Vanilla Civ V or from G&K - If so, it should be a comment in https://github.com/yairm210/Unciv/issues/4697

Problem Description

Inspired by the Stellaris game, I would like to add a Situation feature.

1. Add a new Situations.json file to define Situations.
2. The Situation is represented as a long integer, constrained by maxSituationPoints and minSituationPoints.
3. Situations are categorized into national and global, determined by the isNationalAndNotGlobal constraint (Boolean value).
4. Add trigger-based unique, such as "Change [±amount] points for [SituationName]".
5. Add a new template for the overview button to display Situations, with an option to change the display to the world screen in the settings. I believe Situations are different from Resources, at least for players who are not familiar with the game. PLEASE! PLEASE! PLEASE!

Related Issue Links

No response

Desired Solution

See above.

Alternative Approaches

See above.

Additional Context

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