T16094 JWT verify

[niden]

Hello!

• Type: new feature
• Link to issue: [NFR]: JWT verification/validation #16094

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Added Phalcon\Encryption\Security\JWT\Token::validate() to validate a token's claims
Added Phalcon\Encryption\Security\JWT\Token::verify() to verify a token's signature
Added Phalcon\Encryption\Security\JWT\Validator::getErrors() to return any errors with the validation as an array

Thanks