add rama to TechEmpower's FrameworkBenchmark

[GlenDC]

Add rama to TechEmpower's FrameworkBenchmark: https://github.com/TechEmpower/FrameworkBenchmarks

If you pick up this issue please let it be known here first as a comment. And also link the PR at TechEmpower's repo in this issue as a comment.

Given how closely related the server development with Rama is to Axum you can probably save a lot of time by copying axum's directory at https://github.com/TechEmpower/FrameworkBenchmarks/tree/master/frameworks/Rust/axum and swap out axum with rama. Some other dependencies such as tower can also be removed given rama ships with that already.

For now you can just depend on rama 0.2.0-alpha.6

[GlenDC]

Blocked on getting a new rama release out with some required changes (e.g. build tcp listener from std socket)