Updated the crytpo page, added relevant links and more up to date information

[pUrGe12]

Summary :

This PR is for the issue #346. It is to update the principles of cryptography section with more upto date examples and relevant links. Keeping in mind the contribution guidelines and running them locally first, I made the following changes:

1. Stream cipher examples, RC4 to ChaCha20 (because the RC4 algorithm has many vulnerabilities like biases in the key scheduling algorithm)
2. Updated with note on DES not being a standard, and added AEAD schemes.
3. Corrected spelling errors and other grammatical issues
4. Updated the wordlists to handle acronyms for these new crypto-systems.

Ran and tested according to the guidelines locally.

Description for the changelog :

Added acronyms to wordlists and updated the crypto page

Other info :

closes #346

[jgadsden]

thanks @pUrGe12 , and the automated tests do not run because you are requesting commit into revise-crypto from pUrGe12:revise-crypto, rather than into main

[pUrGe12]

Do you need me to create for the main branch?

[jgadsden]

good to have these changes in @pUrGe12 , very useful to keep the crypto page up to date
the link check fail is not to do with this change, so it can be merged into branch revise-crypto