Converts a bunch of time/delay vars to use time defines (#92495)

## About The Pull Request

Converts as many time vars expressed in deciseconds as I could find to
use time defines.

## Why It's Good For The Game

Makes these values neater and more readable.

## Changelog
🆑
code: Converted a lot of time-based variables to be expressed with time
defines.
/🆑

code/modules/instruments/piano_synth.dm

@@ -63,7 +63,7 @@
 	worn_icon = 'icons/mob/clothing/ears.dmi'
 	inhand_icon_state = null
 	slot_flags = ITEM_SLOT_EARS
-	strip_delay = 100 //air pods don't fall out
+	strip_delay = 10 SECONDS //air pods don't fall out
 	instrument_range = 0 //you're paying for quality here
 	custom_premium_price = PAYCHECK_CREW * 36 //Save up 5 shifts worth of pay just to lose it down a drainpipe on the sidewalk