fix(agent): reduce the size of agent binary by modules separation

internal/autocert/types/provider.go

@@ -0,0 +1,14 @@
+package autocert
+
+import (
+	"crypto/tls"
+
+	"github.com/yusing/go-proxy/internal/task"
+)
+
+type Provider interface {
+	Setup() error
+	GetCert(*tls.ClientHelloInfo) (*tls.Certificate, error)
+	ScheduleRenewal(task.Parent)
+	ObtainCert() error
+}