Day Three on the API Development

Two new API endpoints added: Electric vehicle charge cost per mile. Petrol vehicle fuel cost and cost per mile.

I have also updated the UI with a few quality of life additions:

A dynamic calculation to show how many APIs exist out of the target 100. A sort of home page that contains a brief description of each endpoint. A better cantered UI with a max width limit

Other stuff: I removed the python Milliseconds to Minutes calculation and replaced it with Carbon\CarbonInterval as I felt the calculation was to simple to make use of python. But I will being python back for something heavy later on.