Wraps lowertext() to ensure proper stringification. (#82442)

## About The Pull Request

Fixes #82440

This PR just creates a new macro, `LOWER_TEXT()` (yes the irony is not
lost on me) to wrap around all calls of `lowertext()` and ensure that
whatever we input into that proc will be stringified using the `"[]"`
(or `tostring()` for the nerds) operator. very simple.

I also added a linter to enforce this (and prevent all forms of
regression) because I think that machines should do the menial work and
we shouldn't expect maintainers to remember this, let me know if you
disagree. if there is a time when it should be opted out for some
reason, the linter does respect it if you wrap your input with the
`UNLINT()` function.

code/modules/language/language.dm

@@ -48,7 +48,7 @@
 		var/Y = rand(FLOOR(syllable_count/syllable_divisor, 1), syllable_count)
 		for(var/x in Y to 0)
 			new_name += pick_weight_recursive(syllables)
-		full_name += " [capitalize(lowertext(new_name))]"
+		full_name += " [capitalize(LOWER_TEXT(new_name))]"
 
 	return "[trim(full_name)]"