New Criterion "TagSubtree" matching the "path_string" of tags

[pkamps]

Hi,

for a client project we need to be able to filter by a tag subtree. For example, there is a parent tag called "Category" and there are multiple children tags like "USA", "World" etc. The content objects only have the tags "USA" or "World" assigned (not the "Category" tag). We want to be able to find/filter all content that has any children tags of the "Category" tag.

Therefore I developed a new custom Criterion matching values against the DB field "eztags.path_string". Is that something you consider to add to the official repo?