Support snappy compression

[lucamolteni]

Motivation:

Support snappy as a compression mechanism

Explain here the context, and why you're making that change, what is the problem you're trying to solve.

Similar to https://github.com/eclipse-vertx/vert.x/pull/5176/files but Snappy support is already inside netty so I don't need to include any other dependencies

Conformance:

You should have signed the Eclipse Contributor Agreement as explained in https://github.com/eclipse/vert.x/blob/master/CONTRIBUTING.md Please also make sure you adhere to the code style guidelines: https://github.com/vert-x3/wiki/wiki/Vert.x-code-style-guidelines

[vietj]

For the docs look in the .adoc file in the project and search for brotli

[vietj]

thank you @lucamolteni