Feature request: add support for test suite

[arejula27]

At present, the project lacks sufficient tests. It would be beneficial to develop a concise test suite, particularly for the core package.

[kbdharun]

Yep, I think we can define a Sample recipe along with the intended Containerfile with support for all Vib syntax, we can implement test logic so that the test passes whenever the Containerfile is generated as expected without additional issues/modifications.