[Feature Request] Add support for bzlmod

[Martin-Idel]

Feature description:
Since Bazel switched to using bzlmod (and therefore MODULE.bazel) as the recommended way of dealing with repositories, protovalidate-cc should also support this. In addition, it would be nice to then add the repo into the bazel central registry.

Problem it solves or use case:
Use repository in modern bazel modules.

Contribution:
I can look into it, but I'm not too familiar with that side of Bazel myself, yet.

Examples or references:
protovalidate itself added support recently: https://github.com/bufbuild/protovalidate