Documentation: Explain terraform-compliance internals

[eerkunt]

Documentation Request

• [ ] Explain what terraform-compliance supports, and what does not.
• [ ] Explain the interpolation on BDD tests
• [ ] Explain how terraform-compliance reads terraform plan file
• [ ] Explain what is resource mounting and how it works
• [ ] Explain how to find your own way while writing the tests if you don't know the attributes

[clebio]

• [ ] feature files need to be suffixed .feature

It would be nice if the examples (on the website) were also just in an examples/ folder, since that would, for instance, answer this question that I had.