small refractor.

Key length verification test now correctly  expects a exception to pass. Moved Key legth verification to certificateValidation.py for consistency.
certificate verification test will now test key length from certificateValidation.py

Refractoring. removed duplicated code. Keystore password is now read from environment variable and only if this is not set a manual input is required. Changed tests accordingly. Removed old comments. Tests now use tempdir. Removed monkeypatch usage.

Added unit tests. Added script that generates a ca with openssl. Renamed pkcs12ToJwk for importing purposes according to standards.Added unit-test environment for testing. Added testing to CI.

Added verifications for: x5c chain, jwk key length, certificate key length and signature + hash algorithm. Also updated dependancies and poetry.lock file.