[MIRROR] Fixes paper text length not counting correctly for cyrillic characters [MDB IGNORE] (#20840)

* Fixes paper text length not counting correctly for cyrillic characters (#75021)

## About The Pull Request

It turns out someone used regular length() in papers code which caused
all cyrillic and some other characters to count as two symbols even
though tgui itself shows and counts them as one. Should be working fine
now.

## Why It's Good For The Game

less bugs = better game

## Changelog
🆑
fix: papers should count cyrillic and other non-ascii characters
correctly both server and client-side
/🆑

* Fixes paper text length not counting correctly for cyrillic characters

---------

Co-authored-by: Iajret <8430839+Iajret@users.noreply.github.com>

code/modules/paperwork/paper.dm

@@ -549,7 +549,7 @@
 			return TRUE
 		if("add_text")
 			var/paper_input = params["text"]
-			var/this_input_length = length(paper_input)
+			var/this_input_length = length_char(paper_input)
 
 			if(this_input_length == 0)
 				to_chat(user, pick("Writing block strikes again!", "You forgot to write anthing!"))
@@ -621,7 +621,7 @@
 
 			for(var/field_key in field_data)
 				var/field_text = field_data[field_key]
-				var/text_length = length(field_text)
+				var/text_length = length_char(field_text)
 				if(text_length > MAX_PAPER_INPUT_FIELD_LENGTH)
 					log_paper("[key_name(user)] tried to write to field [field_key] with text over the max limit ([text_length] out of [MAX_PAPER_INPUT_FIELD_LENGTH]) with the following text: [field_text]")
 					return TRUE
@@ -652,7 +652,7 @@
 /obj/item/paper/proc/get_total_length()
 	var/total_length = 0
 	for(var/datum/paper_input/entry as anything in raw_text_inputs)
-		total_length += length(entry.raw_text)
+		total_length += length_char(entry.raw_text)
 
 	return total_length