Add path query region filters

[smix8]

Adds filter lists to exclude or include specific regions in path queries.

This is close to usability that users know from the physics queries exclude lists.

Currently the path queries run over all the enabled regions in the navigation map. The only current way to filter anything is with the navigation_layers bitmask which has its limits. This does not really work well for large maps or when users only want to consider specific regions for a path.

If a region RID is inside the exclude list all the region navmesh polygons (including navlinks that connect from or to them) will not be considered in the path query no matter what (even if in the include list).

As default if the include list is kept empty all regions are used. If a single region RID is added to the include list the path query will only consider region polygons from that list (that are also not in the exclude list).

[Scony]

LGTM, props for adding test!

[kiroxas]

Is there really a way to have both of those active at the same time (include and exclude) ? Seems like we either exclude region or include region, but doing both at the same time seems ... odd ? Seems like the use case is either I want evrything except those (exclude list) or only search inside those (include list), but having both active at the same time seems error prone ? Maybe there is some case I'm not thinking of though. If this is the case, then all could be simplified, as we only need one local vector and all those previous if could become switch cases.

[smix8]

This will just happen with users that both lists are used and some RID slips in both lists. That is how it always goes with users when both include and exclude options are available so better account for it.