Feature: save/load vehicle configurations to park storage

[guysv]

Leftovers:

• [ ] save/load coordinates relative to the current station to allow loading same config on rides different then the source ride.
• [ ] make sure we the save/load dialogs layout is OK
• [ ] save the rest of the interesting car properties such as mass/colors etc ;p
• [ ] other code TODOs i'm gonna get around later

Blocked by https://github.com/OpenRCT2/OpenRCT2/pull/22272

[rolfhermancoen]

The whole idea of saving it to park storage is great, but like @Basssiiie said, this feels a bit too early to be reviewed for a PR.

[guysv]

closing due to figuring out we probably want to do this in a dedicated plugin 🙌