chore: apply non-default clippy fixes

[mkatychev]

Ran cargo clippy --fix --all-targets --all-features -- -W clippy::uninlined_format_args -W clippy::pedantic -W clippy::nursery to apply some non default clippy fixes automatically.

• Added .clippy.toml to the workspace
• Added clippy lint sectio to the workspace Cargo.toml

[pchampin]

any reason why this was not applied to crates inmem and api?

[mkatychev]

I don't recall, I think I had some issues with those crates triggering some false positives. I can take another look soon.

[pchampin]

Thanks. I didn't know about those clippy options, but that's really an improvement :)