Adds our own modular bubber round tips. (#5712)

## About The Pull Request

See title

## Why It's Good For The Game

I think we should be able to make our own round tips without touching
the /tg/ text file.

## Proof Of Testing

<img width="834" height="48" alt="image"
src="https://github.com/user-attachments/assets/9f3a74af-1c64-45dc-963c-8a27f7592bfe"
/>

## Changelog

🆑
code: Added a modular string/bubbertips.txt folder for our own round
tips.
/🆑

code/__HELPERS/game.dm

@@ -335,6 +335,8 @@
 	else
 		var/list/randomtips = world.file2list("strings/tips.txt")
 		var/list/memetips = world.file2list("strings/sillytips.txt")
+		var/list/bubbertips = world.file2list("strings/bubbertips.txt") // BUBBER EDIT - OUR TIPS OF THE ROUND
+		randomtips += bubbertips // BUBBER EDIT
 		if(randomtips.len && prob(95))
 			message = pick(randomtips)
 		else if(memetips.len)

strings/bubbertips.txt

@@ -0,0 +1 @@
+After murdering a protean, did you know you can click them with a pen to clear their memories of the event? It's like that little reset button on your modem! Just make sure to run!