Added Google TOTP Support

[theredcmdcraft]

📋 Description

Please include a summary of the changes and the related issue. Explain the problem that you are solving and provide the
necessary context.

The Problem was, that if you connect to a SSH-Server which has needs a Second-Authentication-Step with the keyboard-interactive Authentication-Method, the Connection will be closed with the Error "all Authentication Methods failed". To fix fix of this Problem is to improve the handling of the keyboard-interactive Event in the ssh2-package. So that the Server will receive the keyboard-interactive Event from the ssh2-npm-package, and if this asks after a Google-Authenticator-TOTP-Code, it sends a Message via the Websocket to the Client(The Frontend), that will prompt to the user to enter the TOTP-Code which will be sended after pressing enter back to the server.

If you have any questions or if i should change anything, feel free to write me. Also for any Improvements and Bugfixes i am happy to hear from you.

🚀 Changes made to ...

• 🔧 Server
• 🖥️ Client
• 📚 Documentation
• 🔄 Other: ___

✅ Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have looked for similar pull requests in the repository and found none

🔗 Related Issues

Fixes #66

[gnmyt]

Hi! Thank you so much for your work on this this. I'll make some changes to this PR since I would prefer a more light approach on handling the event but I really like the feature. I haven't actually head much about TOTP authentication in ssh but it seems to be a thing so it will be included in the next version. Thanks again! :)

[theredcmdcraft]

Hi! Thank you so much for your work on this this. I'll make some changes to this PR since I would prefer a more light approach on handling the event but I really like the feature. I haven't actually head much about TOTP authentication in ssh but it seems to be a thing so it will be included in the next version. Thanks again! :)

Okay fine thank you for your improvements. If you need good docs to setup it ob your own server i can send you good docs.