Port TG#74500: Adds VERB_REF and derivative (#3753)

# About the pull request

This PR ports another 515 compatibility PR from TGStation:
tgstation/tgstation#74500

# Explain why it's good for the game

Future proofing.

# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>

# Changelog
:cl: Drathek
code: Ported VERB_REF and TYPE_VERB_REF from TG for 515 compatibility
/:cl:

.github/guides/STANDARDS.md

@@ -126,7 +126,7 @@ While we normally encourage (and in some cases, even require) bringing out of da
 This is a simple one - as we will eventually move to 515, we will need to ditch this kind of callback. So please don't add any new ones. Make our lives easier.
 
 ### PROC_REF Macros
- When referencing procs in RegisterSignal, Callback and other procs you should use PROC_REF,TYPE_PROC_REF and GLOBAL_PROC_REF macros.
+ When referencing procs in RegisterSignal, Callback and other procs you should use PROC_REF, TYPE_PROC_REF and GLOBAL_PROC_REF macros.
  They ensure compilation fails if the reffered to procs change names or get removed.
  The macro to be used depends on how the proc you're in relates to the proc you want to use:
 
@@ -168,6 +168,8 @@ This is a simple one - as we will eventually move to 515, we will need to ditch
  	addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(funny)), 100))
  ```
 
+ Note that the same rules go for verbs too! We have VERB_REF() and TYPE_VERB_REF() as you need it in these same cases. GLOBAL_VERB_REF() isn't a thing however, as verbs are not global.
+
 ### Signal Handlers
 
 All procs that are registered to listen for signals using `RegisterSignal()` must contain at the start of the proc `SIGNAL_HANDLER` eg;

code/_byond_version_compat.dm

@@ -31,19 +31,37 @@
 #define LIBCALL call_ext
 #endif
 
-// So we want to have compile time guarantees these procs exist on local type, unfortunately 515 killed the .proc/procname syntax so we have to use nameof()
+// So we want to have compile time guarantees these methods exist on local type, unfortunately 515 killed the .proc/procname and .verb/verbname syntax so we have to use nameof()
+// For the record: GLOBAL_VERB_REF would be useless as verbs can't be global.
+
 #if DM_VERSION < 515
-/// Call by name proc reference, checks if the proc exists on this type or as a global proc
+
+/// Call by name proc references, checks if the proc exists on either this type or as a global proc.
 #define PROC_REF(X) (.proc/##X)
-/// Call by name proc reference, checks if the proc exists on given type or as a global proc
+/// Call by name verb references, checks if the verb exists on either this type or as a global verb.
+#define VERB_REF(X) (.verb/##X)
+
+/// Call by name proc reference, checks if the proc exists on either the given type or as a global proc
 #define TYPE_PROC_REF(TYPE, X) (##TYPE.proc/##X)
-/// Call by name proc reference, checks if the proc is existing global proc
+/// Call by name verb reference, checks if the verb exists on either the given type or as a global verb
+#define TYPE_VERB_REF(TYPE, X) (##TYPE.verb/##X)
+
+/// Call by name proc reference, checks if the proc is an existing global proc
 #define GLOBAL_PROC_REF(X) (/proc/##X)
+
 #else
-/// Call by name proc reference, checks if the proc exists on this type or as a global proc
+
+/// Call by name proc references, checks if the proc exists on either this type or as a global proc.
 #define PROC_REF(X) (nameof(.proc/##X))
-/// Call by name proc reference, checks if the proc exists on given type or as a global proc
+/// Call by name verb references, checks if the verb exists on either this type or as a global verb.
+#define VERB_REF(X) (nameof(.verb/##X))
+
+/// Call by name proc reference, checks if the proc exists on either the given type or as a global proc
 #define TYPE_PROC_REF(TYPE, X) (nameof(##TYPE.proc/##X))
-/// Call by name proc reference, checks if the proc is existing global proc
+/// Call by name verb reference, checks if the verb exists on either the given type or as a global verb
+#define TYPE_VERB_REF(TYPE, X) (nameof(##TYPE.verb/##X))
+
+/// Call by name proc reference, checks if the proc is an existing global proc
 #define GLOBAL_PROC_REF(X) (/proc/##X)
+
 #endif

code/_onclick/click.dm

@@ -82,7 +82,7 @@
 		return
 
 	face_atom(A)
-	if(mods["middle"]) 
+	if(mods["middle"])
 		return
 	// Special type of click.
 	if (is_mob_restrained())
@@ -334,7 +334,7 @@
 	if(prefs.adaptive_zoom)
 		INVOKE_ASYNC(src, PROC_REF(adaptive_zoom))
 	else if(prefs.auto_fit_viewport)
-		INVOKE_ASYNC(src, .verb/fit_viewport)
+		INVOKE_ASYNC(src, VERB_REF(fit_viewport))
 
 /client/proc/get_adaptive_zoom_factor()
 	if(!prefs.adaptive_zoom)