Add vehicle chargings and trips API endpoint

[GewoonJaap]

This PR adds endpoints to retrieve vehicles charging sessions and the trips.

[GewoonJaap]

Also added CURL to the Docker image to support HTTP healthchecks for the container.

[flobz]

thanks for you contribution I will look at it.

[GewoonJaap]

Thank you @flobz I see the pipeline fails now because I added the curl package to enable docker HTTP health checks. Should I pin curl to a version?

[vineethktpla]

Very useful and good work @GewoonJaap . Was waiting for this for a long time and I hope it will merge soon.
This will ease my work in home assistant to track the trips. I am currently using trigger based automations to calculate and my trips and charging sessions

[flobz]

Thanks for you contribution.
Could you look to my suggested changes ?

[GewoonJaap]

Thanks for you contribution. Could you look to my suggested changes ?

Updated the API and readme with the new endpoints and changed the JSON return method as you suggested :)

[flobz]

lgtm thanks !