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/interview/interview.dm

@@ -160,4 +160,4 @@
  * Generates a clickable link to open this interview
  */
 /datum/interview/proc/link_self()
-	return "<a href='?_src_=holder;[HrefToken(forceGlobal = TRUE)];interview=[REF(src)]'>Interview #[id]</a>"
+	return "<a href='byond://?_src_=holder;[HrefToken(forceGlobal = TRUE)];interview=[REF(src)]'>Interview #[id]</a>"