chore: Standardize Cargo.toml files, enable more workspace dependencies

[bryantbiggs]

• Attempt to unify and standardize the Cargo.toml files used through the project
  • Order the dependencies alphabetically; the async deps have been kept as a separate section but happy to include this in the mix as well
  • In the future it would be nice to use cargo-sort and have a CI check to keep it consistent but currently it lacks support for workspace inheritence
  • Hoist up dependencies to the main Cargo.toml and use the workspace dependency inheritance to align versions
  • Add keywords and categories sections where missing
• Add the client examples to its Cargo.toml

[jsturtevant]

LGTM

[mxpv]

@bryantbiggs Could you pls rebase changes to resolve merge conflicts?