Refactoring of unwraps and expects

Usage related changes

None

closes #567 Remove some expects in the code, or refactor them to use match statement Added linters to ./scripts/clippy_check.sh

[ ] Checked out the contribution guidelines
[ ] Applied formatting - ./scripts/format.sh
[ ] No linter errors - ./scripts/clippy_check.sh
[ ] No unused dependencies - ./scripts/check_unused_deps.sh
[ ] No spelling errors - ./scripts/check_spelling.sh
[ ] Performed code self-review
[ ] Rebased to the latest commit of the target branch (or merged it into my branch)
- Once you make the PR reviewable, please avoid force-pushing
[ ] Updated the docs if needed - ./website/README.md
[ ] Linked the issues resolvable by this PR - linking info
[ ] Updated the tests if needed; all passing - execution info