Apply some clippy rules to make code following good convention.

[DreamWuGit]

From observations in the ecc repository, it is evident that there are obvious violations of Rust's standard coding guidelines, which subsequently have a negative impact on code quality. An example of addressing this issue can be seen in pull request PolyhedraZK/ExpanderCompilerCollection#106 , where these Rust standard rules have been tried to apply to the ECC repository.
if more such rules are identified, they should be incrementally incorporated into the codebase.

Additionally, this ensure that all future contributions adhere strictly to these guidelines to maintain high code quality.