Add Ensenso support

If you want to test please read [the tutorial](https://github.com/VictorLamoine/pcl/blob/0edce4668df781fe62731a6a92c00f4e2cf28815/doc/tutorials/content/ensenso_cameras.rst) first. Of course for the last steps, you need an Ensenso device!

Every comment, question is welcome.
The code is far from being perfect and I wish to improve it:

- [ ] `TicToc` doesn't work well (I get strange timing), thus `getFramePerSecond` is not working
- [ ] I'm not sure I understood how [stop](https://github.com/VictorLamoine/pcl/commit/7658f9bfa3c41d0c250bf409e7e28d1bbd09e213#diff-7056f6947afc7867ca78f7d9719a0244R239) is meant to be written