feat(blogo,plugins,listplugin): list plugin support

blogo/blogo.go

@@ -76,6 +76,13 @@ func New(opts ...Options) Blogo {
 func (b *blogo) Use(p Plugin) {
 	log := b.log.With(slog.String("plugin", p.Name()))
 
+	if p, ok := p.(ListPlugin); ok {
+		log.Debug("Added plugin", slog.String("type", "PluginList"))
+		for _, p := range p.Plugins() {
+			b.Use(p)
+		}
+	}
+
 	if p, ok := p.(SourcerPlugin); ok {
 		log.Debug("Added plugin", slog.String("type", "SourcerPlugin"))
 		b.sources = append(b.sources, p)

blogo/plugins.go

@@ -24,6 +24,11 @@ type Plugin interface {
 	Name() string
 }
 
+type ListPlugin interface {
+	Plugin
+	Plugins() []Plugin
+}
+
 type RendererPlugin interface {
 	Plugin
 	Render(src fs.File, out io.Writer) error