Expanding the ~/ to the full home dir of user about navigation2

[SteveMacenski]

A PR to add that would be appreciated :-) Obviously need to add the checks on functions as you mention (and make sure the path is > 1 long to be able to index from 0/1).

You can also use the yaml files and use launch substitutions within that context, example:

$(find-pkg-share my_package)/behavior_tree/my_nav_to_pose_bt.xml

This is a use case of relative path locations as long as its stored in a package structure.

[Wiktor-99]

I'm aware of the launch substitutions, but when you want fiddle around and test something sometimes it could be faster to pass path form terminal. Anyway |'ve add PR with fixed linting.

Thanks for help :)