This commit ports the crypt library from the Core repository to the Enchantrix repository. It includes the following changes:
- The project is now a Go module.
- The `lthn` and `crypt` packages have been ported from the Core repository.
- The PGP functionality has been commented out pending resolution of dependency issues.
- The old Deno project has been moved to the `vault` directory.
- The README has been updated to reflect the new project structure.
