Make more use of convenience methods

FossilOrigin-Name: 89fbd7a1520ecb65809b4c1bd10006ce9bb3a662cb7e7804abaf85d1ee1da63a

src/ConsoleLine.m

@@ -0,0 +1,18 @@
+#import "ConsoleLine.h"
+
+@implementation ConsoleLine
++ (instancetype)lineWithText:(OFString *)text outtime:(int)outtime
+{
+	return [[self alloc] initWithText:text outtime:outtime];
+}
+
+- (instancetype)initWithText:(OFString *)text outtime:(int)outtime
+{
+	self = [super init];
+
+	_text = [text copy];
+	_outtime = outtime;
+
+	return self;
+}
+@end