Add option to delete secret key without confirmation dialog

[manu3569]

Add Option to Delete GPG Key Without Confirmation Dialog

Summary

This PR introduces the ability to delete GPG keys without prompting for confirmation. This is achieved by leveraging the new gpgme_op_delete_ext function introduced in GPGME 1.9.1. Additionally, this update introduces two flags:

• DELETE_ALLOW_SECRET: Allows deletion of secret keys alongside public ones.
• DELETE_FORCE: Forces the deletion of keys without the confirmation dialog.

Changes

• New Method: gpgme_op_delete_ext:

  • Introduced in the C extension (gpgme_n.c) to allow deletion of GPG keys using additional flags.
  • Uses the GPGME gpgme_op_delete_ext function which allows the passing of flags (GPGME_DELETE_ALLOW_SECRET, GPGME_DELETE_FORCE).

• Constants:

  • Added constants for GPGME_DELETE_ALLOW_SECRET and GPGME_DELETE_FORCE to expose these new flags to the Ruby interface.

• Ruby Methods:

  • Updated GPGME::Ctx#delete_key and GPGME::Key#delete! methods to accept an additional force parameter, which suppresses the confirmation dialog when deleting keys. They default to false to ensure a non-breaking change.

Usage Example:

# Delete a secret key with forced deletion (no confirmation prompt)
key.delete!(true, true)

Compatibility:

• This update requires GPGME version 1.9.1 or later due to the usage of the gpgme_op_delete_ext method.

---

Let me know if you'd like to add or modify anything! Any pointers regarding writing a test to detect the dialog?

[ueno]

This looks great, thanks!