City exclusives, rural exclusives

[LovamKicsiGazsii]

Summary

Content "City exclusives, rural exclusives"

Purpose of change

Removes stuff that don't belong in cities, migrates the ones that do & vice versa.
Partially addresses #62747.

Describe the solution

• removed ponds from cities — we have better things to put into cities than wilderness ponds.
• migrated nature trails from rural spawns to cities — started to look a wee bit outdated once forest trails were added, repurposed as urban forestry.
• removed public ponds, fishing ponds, small warehouses from rural spawns — sidewalks looked a bit jarring outside of cities (as mentioned in Roads don't generate sensibly around gas stations #59482); but worry not, I do intend to replace them with bigger, more rural-fitted locations pretty soon™.

Describe alternatives you've considered

Not removing stuff.

Testing

Game loads without errors. Noticed a lack of ponds and an increase in nature trails in cities.

Additional context