Add more docs to crypto crate

[Hinton]

Type of change

- [ ] Bug fix
- [ ] New feature development
- [x] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

Add some more documentation for crypto crate.

Before you submit

• Please add unit tests where it makes sense to do so

[github-actions]

Checkmarx One – Scan Summary & Details – 43278ab3-342c-4229-81ee-46d68a888fa0

No New Or Fixed Issues Found

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.66%. Comparing base (dfe067e) to head (1425a47).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #722   +/-   ##
=======================================
  Coverage   60.66%   60.66%           
=======================================
  Files         173      173           
  Lines       10628    10628           
=======================================
  Hits         6447     6447           
  Misses       4181     4181           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.