[Benchmarks] Add the WTX project

[c410-f3r]

WIP. I will add the remaining bench_loading_associations_sequentially benchmark group as soon as 1.75 hit stable.

Edit: NVM, it is already finished.

[weiznich]

Thanks for opening this PR. This looks good to be merged, beside the minor thing about integration into the CI setup.

[c410-f3r]

 assertion `left == right` failed
  left: [("Sean says hi", Some("updated")), ("Tess says hi", Some("updated")), ("Ruby says hi", None)]
 right: [("Tess says hi", Some("updated")), ("Sean says hi", Some("updated")), ("Ruby says hi", None)]
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Unrelated