Check for recovery mode and fix numeric list missparsing

[stsewd]

I'm making the external scanner aware of tree-sitter correction mode (https://tree-sitter.github.io/tree-sitter/creating-parsers#other-external-scanner-details), this will hopefully help to move the parsing of text nodes to JS.

While doing this also found a bug

tree-sitter-rst/src/tree_sitter_rst/parser.c

Lines 135 to 137 in c7c2b24

	if (adornment == '(' && is_numeric_bullet(scanner->lookahead)) {
	return parse_inner_numeric_bullet(scanner, true);
	}

That is trying to parse the text as a numeric bullet, even if the token isn't valid in that context, a check for && valid_symbols[T_NUMERIC_BULLET] was added.

Fixes #31