[MIRROR] pixel perfect 4x [MDB IGNORE] (#25182)

* pixel perfect 4x (#79660)

## About The Pull Request
Adds pixel perfect 4x and 4.5x scaling. I tested it and it seems to work
though 4.5 scaling causes very slightly distorted pixel sizes. There's
also a bit of letterboxing but I think that happens with all of the
pixel perfect settings.

## Why It's Good For The Game
better fits 4k monitors and isn't stretch to fit

## Changelog
🆑
qol: adds pixel perfect 4x, 4.5x, and 5x
/🆑

* pixel perfect 4x

---------

Co-authored-by: aaaa1023 <74441292+aaaa1023@users.noreply.github.com>

code/modules/client/preferences/pixel_size.dm

@@ -4,7 +4,7 @@
 	savefile_identifier = PREFERENCE_PLAYER
 
 	minimum = 0
-	maximum = 3
+	maximum = 5
 
 	step = 0.5