lessthanthree f97830c982 Change pride tiles to generic holiday tiles, add Tramstation support (#75665) ...

## About The Pull Request

- Rewrites the Pride Week rainbow tiles coloring into a more generic
'Holiday' tile coloring proc so that it can be used by any holiday
- Adds support for different color patterns
- Adds support for the trimline decal subtype Tramstation uses
- Adds stack types for tram tiles so that if you pull them up you can
put them back
- Fixes naming of tile decals

## Why It's Good For The Game

- The generic proc allows us to specify a different color set for each
holiday (think red white blue for July 4, or red/white/green for
Christmas)
- Players now have a way to put back tram platform tiles that have been
pulled up
- Tramstation gets colored tiles like the other maps


![image](https://github.com/tgstation/tgstation/assets/83487515/0b6ebf5e-43f1-4453-b680-6a4573392b10)

## Changelog

🆑 LT3
fix: Tram platform tiles now have proper stack types
refactor: Pride week tile coloring refactored into a generic holiday
decal system
spellcheck: Tile decals are no longer all named 'corner'
/🆑

2023-06-07 11:06:00 +12:00

..

foreign_calendar.dm

…

holidays.dm

Change pride tiles to generic holiday tiles, add Tramstation support (#75665)

2023-06-07 11:06:00 +12:00

nth_week.dm

…