ci: format checks

[antoncoding]

Summary

• added CI script to check code format
• added a cargo module that auto format term.toml, and have a --check flag that can be used for CI to check if all terms are sorted
• resolve #1

Run check and panic if not sorted:

cargo run -- --check

[antoncoding]

Thanks for adding the CI check and the formatting check. I added some feedback.

I noticed some duplicated logic in the check_terms/src/main.rs. Can we move them to src/main.rs?

Totally reasonable. I wasn't paying attention to the root crate. Just added a --check flag into main.rs, and now we can just run cargo run -- --check on the root directory instead of switching between modules