Completely overhaul the API to use PathBuf instead of Strings

[maspe36]

Fixes #11

Pretty much every usage of ament_rs I could find almost immediately converts the results from the library into a PathBuf for further path manipulations [1] [2] [3]. So this inspired me to give this crate a face lift and overhaul the API to use PathBufs directly.

This should have all the functionality of the old implementation except for the has_* functions. I didn't find any usages of them and its somewhat redundant when you can do a find and just check that the optional isn't empty.

i.e.

ament_rs::find_package("rcl_interfaces")?.is_some()

Some other items to note

• This overhaul includes tests
• I managed to drop all dependencies except for std (outside of tests)

[maspe36]

We should probably look to update this license to Apache 2.0 like the rest of the ros2_rust crates
https://github.com/ros2-rust/ros2_rust/blob/main/LICENSE

[azerupi]

I can't really speak to the removed nix files, I don't know anything about nix. But the code changes look good 👍

[maspe36]

I can't really speak to the removed nix files, I don't know anything about nix. But the code changes look good 👍

Oh yeah, thanks for reminding me about this. I also decided to remove the devenv files (https://devenv.sh/)

I'm not too familiar with this but I figured this is a simple rust crate and it was essentially rewritten so whatever configuration that was there is likely no longer valid.

[esteve]

I'd keep Gérald as the original author, but add yourself as a maintainer.