Add support for inline comments

[dylanahsmith]

Problem

Adding a # inline comment tag for Shopify/liquid#1393 requires changing the parsing code to recognize that as a tag.

Solution

Change the code path for where no word characters are found for tag name, so this shouldn't even impact the performance of handling non-comment tags.

[samdoiron]

I'm seeing a test failure in Liquid here when combined with this branch

    assert_template_result('2', '{{ list[foo] }}', 'foo' => IntegerDrop.new('1'), 'list' => [1, 2, 3])

Source

This looks unrelated, though. Perhaps a bug on main?

[samdoiron]

This may also be because the branches are out of date, checking that now.