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/wiremod/components/action/equpiment_action.dm

@@ -89,4 +89,4 @@
 	for(var/ref in granted_to)
 		var/datum/action/granted_action = granted_to[ref]
 		granted_action.name = button_name.value || "Action"
-		granted_action.button_icon_state = "bci_[replacetextEx(lowertext(icon_options.value), " ", "_")]"
+		granted_action.button_icon_state = "bci_[replacetextEx(LOWER_TEXT(icon_options.value), " ", "_")]"