Bevy's SimpleQuery needs filter support #43
Description
Legion's Query type is pretty nasty to construct manually / isn't suitable for Bevy's system functions. It was clearly designed to be constructed using a builder pattern. To solve this, Bevy defines its own SimpleQuery type, which then gets exported as Query. This is great, but it currently doesnt support query filters, which are a pretty big feature/selling point of Legion. SimpleQuery should have some way to define filters, ideally in a way that doesnt use legion's filter type directly. This will likely require some shenanigans.