[done] Encrypter

This has certainly stirred a lot of comments, some for & some against the idea of having encryption built into CI4!
The wind is blowing 2:1 in favor of having it, but the poll is flawed in that it did not provide a "not" option in the beginning.

I did a bit of research into other frameworks' handling of encryption, and thought you might find the results interesting.
They follow, alphabetically by framework with encryption...

Laravel 5
- module Encryptions\Encrypter
- Similar to CI4 proposed, tho more methods exposed
- OpenSSL only
- Encryption\EncryptionServiceProvider classes
- Docs at https://laravel.com/docs/5.8/encryption
- very similar to what I am proposing

Yii 2
- Module yii\base\security
- openSSL based
- Encryption/decryption, key derivation, hashing & validation
- Similar to CI3 encryption

Zend 2
- Module Zend\Crypt
- symmetric encryption, bunches of classes; possibly some public/private keypait stuff
- Docs at https://docs.zendframework.com/zend-crypt/
- More complicated and far-reaching than what I am thinking of

CakePHP, FuelPHP & Symfony
- don't appear to address encryption in either the core or standard addins