fix: Hiddify and Support grpc mode - gun or multi

[ImMohammad20000]

• fix #827 bug subscription invalid config error
• #659 Only need to be configured in outbound (client)
• fix kcp misspled

[ImMohammad20000]

why this PR not merging?

[AetherMagee]

probably because you put multiple unrelated changes into a singular PR

[realartin]

به این ها خیلی نیازه لطفا مرج کنید