This resolves a particular issue with parsing YAML multiline, for
example:
```yaml
a: |
multiline literal
line 2
```
The regex used would capture the amount of indentation in the third
capture group and then use that as a kind of "status" to know which
lines are part of the indented multiline. However, because its a
captured group it has to be assigned a token which was `TextWhitespace`.
This meant that the indentation was outputted after the multiline,
technically it should be seen as an non-captured group, but then its no
longer to refer to it in the regex. Therefore I've gone with the
solution to add a new token, Ignore, which will not be emitted as a
token in the iterator, which can safely be used to make use of capture
groups but not have them show up in the output.
## Before
## After
Ported lexers for mcfuntion, snbt from Pygments using
`pygments2chroma_xml.py` script.
While doing so, I encountered lack of `LiteralNumberByte` in TokenType,
so I've added the type and regenerated tokentype_enumer.go.
