tiAuth

We have decided to replace the NanoLimbo virtual server with PicoLimbo. This change provides the following advantages:

1. Lower server resource consumption.
2. Support for schematics.

Changelog:

1. Added 1.26.2 support for the virtual server.
2. Added TOTP two-factor authentication (Google Authenticator).
3. Added Argon2 hashing algorithm.
4. Added plugin update checker.
5. Fixed a potential issue with SHA256 hashing.
6. Fixed a potential Path Traversal vulnerability.