feat: support changing file modes

[ribru17]

This commit also properly exposes the similarity index as a node (previously field would not work for anonymous regex nodes). It also updates the Tree-sitter version, which generated the associated new bindings.

EDIT: It also exposes the argument portion of the (command) node

[the-mikedavis]

You're saying that (similarity score: _ @somecapture) doesn't work when that field is just a regex? Switching to a named score node instead seems ok to me.

Could you undo the unrelated changes? The PR can just be the line about the similarity node - the CI will take care of regenerating the parser.c

[ribru17]

Could you undo the unrelated changes? The PR can just be the line about the similarity node - the CI will take care of regenerating the parser.c

Sure, sorry for the giant diff 😆

You're saying that (similarity score: _ @somecapture) doesn't work when that field is just a regex? Switching to a named score node instead seems ok to me.

For me, no: I got invalid structure complaints. Also I was never able to even see the field exposed in the parsed tree

[the-mikedavis]

Thanks! I've pushed to split the changes up a little, so the commit history is easier to follow.

[ribru17]

Of course, and thank you!