Implement -X/--max-errors for RGBASM (#1262)

Co-authored-by: Eldred Habert <me@eldred.fr>

contrib/bash_compl/_rgbasm.bash

@@ -43,6 +43,7 @@ _rgbasm_completions() {
 		[Q]="q-precision:unk"
 		[r]="recursion-depth:unk"
 		[W]="warning:warning"
+		[X]="max-errors:unk"
 	)
 	# Parse command-line up to current word
 	local opt_ena=true

contrib/zsh_compl/_rgbasm

@@ -60,6 +60,7 @@ local args=(
 	'(-Q --q-precision)'{-Q,--q-precision}'+[Set fixed-point precision]:precision:'
 	'(-r --recursion-depth)'{-r,--recursion-depth}'+[Set maximum recursion depth]:depth:'
 	'(-W --warning)'{-W,--warning}'+[Toggle warning flags]:warning flag:_rgbasm_warnings'
+	'(-X --max-errors)'{-X,--max-errors}'+[Set maximum errors before aborting]:maximum errors:'
 
 	":assembly sources:_files -g '*.asm'"
 )