Updates href uses for 516 (#88699)

## About The Pull Request

Was just scrolling through the Paradise github since they seem to have
more work done for 516 to see if there's anything I can port over, found
this and thought why not.

Ports parts of https://github.com/ParadiseSS13/Paradise/pull/25105
Specifically, updaing all hrefs to use the internal ``byond://``, and
adding it to grep.

## Why It's Good For The Game

More work towards 516.

## Changelog

Nothing player-facing.

code/modules/admin/view_variables/view_variables.dm

@@ -257,7 +257,7 @@ ADMIN_VERB_AND_CONTEXT_MENU(debug_variables, R_NONE, "View Variables", "View the
 					</td>
 					<td width='50%'>
 						<div align='center'>
-							<a id='refresh_link' href='?_src_=vars;
+							<a id='refresh_link' href='byond://?_src_=vars;
 datumrefresh=[refid];[HrefToken()]'>Refresh</a>
 							<form>
 								<select name="file" size="1"