Add docs section describing a comparison between the lifecycle of this repository and OpenZeppelin Contracts

[gonzaotc]

Provide a clear and concise lifecycle comparison between this library and OpenZeppelin Contracts for the community to easily understand their different processes and end goals.

Explain which pieces are experimental and intended to "mature" here, eventually getting merged/moved into OpenZeppelin Contracts, and which ones are intended to be kept here definitively for the purpose of contributing with third-party teams.

[ernestognw]

This should be a documentation section, similar to https://docs.openzeppelin.com/contracts/5.x/backwards-compatibility