feat: atchops_rsa_key_generate_base64

[JeremyTubongbanua]

- What I did

• Added a new atchops_rsa function: atchops_rsa_key_generate_base64
• Refactored atchops_rsa_key_generate to utilize the new atchops_rsa_key_generate_base64 function
• Added a test to ensure that atchops_rsa_key_generate_base64: 1. properly generated a key, 2. the keys could be used to populate our rsa key srtucts and 3. the keys could be used to encrypt/decrypt a basic plaintext
• Refactored test_rsa_generate to test_rsa_key_generate

- How to verify it

• New test passes
• and previous tests pass

- Description for the changelog
feat: atchops_rsa_key_generate_base64

[XavierChanth]

Can you explain a little more about history of aes generate vs history of rsa generate, we had an aes_generate_base64 and it was removed to keep the public interface simple, so why are we adding rsa_generate_base64

[JeremyTubongbanua]

To put it simply, atchops is a wrapper around MbedTLS (we make it simple for us to call MbedTLS for our use case)

MbedTLS AES generation: outputs bytes
MbedTLS RSA generation: outputs base64

So therefore

Atchops AES generation: outputs bytes
Atchops RSA generation: outputs base64