fix(razorback): parser can parse multiple tags + ignore EOI

[fisherjacobc]

Currently, razorback can only parse one tag, since the parser is parsing the script as a Rule::value and not as Rule::script

This PR fixes this issue, allowing for every tag to be parsed

[fisherjacobc]

I just noticed that it doesn't support outer nodes, will fix soon

[sylv]

EOI I don't think should be in the result but it should be ignored in the parse_pair function. Here it's being parsed into a node only to be ignored which is kinda gross.
parse_pair might have to be changed to return Option<Node> so it can reply with None but thats kinda a pain in the ass

[fisherjacobc]

Option<Node> is probably the best bet