pubky_test

Main library for the test macro.

Merges the drop_db_helper and test_macro into one crate.

Procedural macros in rust must be in their own crate. It can't provide additional methods. That's why 3 crates are needed.

• drop_db_helper provides the base methods to drop test databases.
• test_macro uses drop_db_helper to drop the test databases after the test completes.
• pubky_test provides one convenient crate for both.