Support for dotenvx for encrypted .env files

[dec0dOS]

Describe the feature

Currently, c12 supports loading environment variables from .env files but does not natively support .env files that are encrypted using tools like dotenvx.

Alternatives considered:

• Manually decrypting .env files using dotenvx before passing them to c12, but this adds extra steps and potential points of failure.
• Writing a custom wrapper around c12 to integrate dotenvx, but this duplicates effort and decreases usability.

Additional Context:
dotenvx is gaining popularity for secure .env file encryption and decryption.

Thank you for considering this feature request!

Additional information

• Would you be willing to help implement this feature?