Add Compatible Analysis Documentation

[boundless-forest]

The differences in compatibility and status between Frontier and Ethereum often raise questions, especially for those new to the Frontier ecosystem. It's important for newcomers to have a clear understanding of what can be expected in terms of compatibility and any potential issues. While individual projects may offer their own explanations, these can vary significantly.

To provide a consistent and clear reference, I propose the creation of an official compatibility analysis document. This would outline the key points of interoperability between Frontier and Ethereum, highlighting both compatible elements and notable discrepancies. Such a document would be an invaluable resource for users and developers, offering a standardized overview of how Frontier relates to, and differs from, Ethereum.