Produce a scenario file with all implemented content

[WildWeazel]

Create a scenario file similar to c7-static-map-save.json that contains all implemented content immediately available to the player. This allows testers to easily validate new assets, game items, and behaviors.

The scenario should include:

• Each terrain type in as many tile configurations as possible (using all terrain graphics)
• Each resource, connected to the player
• Each city size, owned by the player
• Each building present in one of the cities
• Each unit type on its own tile, belonging to the player
• Each terrain improvement, in the player's territory
• All AI opponents, known to the player
• All techs known to the player

This scenario will need to be maintained as more content is added or enabled.