`relative_location` does not support macro lines

[foxeddev]

The relative_location plugin does not work on macro lines.

Example:

Source:

foo:bar/function.mcfunction

$function ./function_with_arg {arg:$(arg)}
function ./function_without_arg
$function foo:bar/function_with_arg {arg:$(arg)}

builds:

foo:bar/function.mcfunction

$function ./function_with_arg {arg:$(arg)}
function foo:bar/function_without_arg
$function foo:bar/function_with_arg {arg:$(arg)}

^{please fix, my code looks so ugly rn}