Add subscribe service whcih could support clash or stash

[GHParadise]

Is your feature request related to a problem? Please describe.
Currently, the subscribe QR code could not import to Stash or Clash, this make us hard to use, need import every node mannually, hard to use.

Describe the solution you'd like
Could we add subscribe QR code support Stash ?

Describe alternatives you've considered
Other feature is good, Thank you.

Additional context
Stash currently not support current format of QR Code .