replace modules with go plugins.

pkg/types/plugins.go

@@ -0,0 +1,22 @@
+package types
+
+import (
+	"github.com/spf13/cobra"
+)
+
+type Plugin interface {
+	Config() PluginConfig
+	Start(PluginManagers)
+	Shutdown() error
+}
+
+type PluginConfig interface {
+	Init(cmd *cobra.Command) error
+	Set()
+}
+
+type PluginManagers struct {
+	SessionManager   SessionManager
+	WebSocketManager WebSocketManager
+	ApiManager       ApiManager
+}