Support pattern matching in ModelToggle mod

[copygirl]

My model has some parts that are separate, but should be shown/hidden as a unit, so I would have to create multiple ModelToggle mods for each part, all using the same redeem as a trigger. In some cases, the parts of the model share part of their name. So I figured it'd be nice to "fuzzily" match node names and apply to multiple at the same time, which thankfully, find_children already supports.

I decided to filter for only Node3D nodes, as those have the visible property we care about. And I enabled recursive search, since objects attached to bones may appear as children of those bones in the skeleton, apparently.

There is the possibility to create a helper method (such as models_set_visibility(bool) or so) to deduplicate code, but I decided to keep the changes straight-forward. If desired, I could include this suggestion.

Example

Model has "Belt", "Belt_Buckle", "Belt_Pouch" parts.
Specify Belt* for Model Name to be able to toggle visibility of all three at once.

[copygirl]

If we wanted to go further, we could also allow specifying a list of model names easily, either via a comma-separated list or similar, or via supporting multi-line TextEdit inputs, which incidentally I needed for another mod of mine, so I might PR that, too.