Feature/include unreachable mods

[CSRessel]

Pull Request Template

Description

This PR addresses #593

Several algorithms across different categories weren't included in declaration tree in the corresponding mod.rs file. As a result, formatting/linting/testing hasn't been enforce on these files, so there are both automated and manual fixups needed on many of these files.

This PR includes all algorithms in the mod declaration tree, and fixes the formatting and linting errors, and fixes the tests for wiggle sort.

Lastly, a reminder was added to the PR checklist for including any new algorithm into the corresponding mod.rs file.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I ran bellow commands using the latest version of rust nightly.
• I ran cargo clippy --all -- -D warnings just before my last commit and fixed any issue that was found.
• I ran cargo fmt just before my last commit.
• I ran cargo test just before my last commit and all tests passed.
• I added my algorithm to DIRECTORY.md with the correct link.
• I checked COUNTRIBUTING.md and my code follows its guidelines.

Please make sure that if there is a test that takes too long to run ( > 300ms), you #[ignore] that or
try to optimize your code or make the test easier to run. We have this rule because we have hundreds of
tests to run; If each one of them took 300ms, we would have to wait for a long time.

[siriak]

Looks good, thanks!