control: Move serves into a separate components

internal/component/server.go

@@ -0,0 +1,18 @@
+package component
+
+import (
+	"net/http"
+
+	"github.com/tkw1536/goprogram/stream"
+)
+
+// Servable implements a component with a Serve method
+type Servable interface {
+	Component
+
+	// Routes returns the routes served by this servable
+	Routes() []string
+
+	// Handler returns the handler for the requested route
+	Handler(route string, io stream.IOStream) (http.Handler, error)
+}