[Feature]: Increase link size limit for QR code generation

Is your feature request related to a problem?

I guess, link size limitation was implemented to keep QR codes readable from small devices, but it is actually inconvenient sometimes.

Describe the solution you'd like

On the panel settings, add a setting to set custom link size limit. As an alternative (instead of a text field) add a switch to disable this limitation. Or just disable this limitation at all, but i don't know how it may affect mobile UI.

Alternatives you've considered

Since frontend code is compiled into a binary file, the only possibility to get around that is to use non-persistent browser console scripts, which require quite too much effort to just get one QR code.

Concrete use case

I believe this would be useful for anyone who want to share configurations without need to send links over insecure channels (or manually typing, which gonna be painful, because even 3xui thinks the link is too long)

Mockups, screenshots, or examples

No response

Which parts of the panel would this affect?

Frontend (UI / panel pages)

Are you willing to help?

• I'd like to implement this feature myself and open a PR.
• I can help test once a PR is open.

Before submitting

• I searched existing issues and this feature has not been requested.
• This feature request is written in English.