[Feature] Support More Proxy Protocols

[lurenjiamax]

Currently, serenity use github.com/Dreamacro/clash as ProxyConfig Parser.

https://github.com/SagerNet/serenity/blob/dev/subscription/parser/clash.go#L29

import (
....
	"github.com/Dreamacro/clash/adapter"
	clash_outbound "github.com/Dreamacro/clash/adapter/outbound"
	"github.com/Dreamacro/clash/common/structure"
	"github.com/Dreamacro/clash/config"
	"github.com/Dreamacro/clash/constant"
)

...
func ParseClashSubscription(_ context.Context, content string) ([]option.Outbound, error) {
	config, err := config.UnmarshalRawConfig([]byte(content))
	if err != nil {
		return nil, E.Cause(err, "parse clash config")
	}
	decoder := structure.NewDecoder(structure.Option{TagName: "proxy", WeaklyTypedInput: true})
	var outbounds []option.Outbound
	for i, proxyMapping := range config.Proxy {
		proxy, err := adapter.ParseProxy(proxyMapping)     <--- // Unspported Proxy Type Exception 
		if err != nil {
			return nil, E.Cause(err, "parse proxy ", i)
		}

It will be better to move to github.com/metacubex/mihomo , which supports a lot more modern proxy protocols like: snell, vless, mieru, etc.

[daifiyum]

github.com/metacubex/mihomo uses related packages for sing, and the version updates are not active. If directly called in serenity, issues may arise. It is recommended to maintain the clash outbound structure independently rather than relying on mihomo.