Refactor proxy structure and parser implementations to streamline protocol handling; remove unused marshaler interfaces and improve YAML serialization for various proxy types.

model/proxy/socks.go

@@ -0,0 +1,8 @@
+package proxy
+
+type Socks struct {
+	Server   string `yaml:"server,omitempty"`
+	Port     int    `yaml:"port,omitempty"`
+	Username string `yaml:"username,omitempty"`
+	Password string `yaml:"password,omitempty"`
+}