Rootcanal

What's Changed
* use importlib.resources rather than distutils https://github.com/google/rootcanal/pull/9
* update pdlc version https://github.com/google/rootcanal/pull/13
* ll: close remotes with `POWER_OFF` instead `TIMEOUT` https://github.com/google/rootcanal/pull/14
* improve the controller python interface https://github.com/google/rootcanal/pull/15

**Full Changelog**: https://github.com/google/rootcanal/compare/v1.1.0...v1.4.0

Build a python wheel for RootCanal which includes the `rootcanal` binary and bindings to the rootcanal controller.

Initial release of RootCanal.