port more examples over to new generated bindings

plugins not yet working, examples mostly untested

examples/plugins/registered_elements/internal/customsrc/register.go

@@ -1,22 +1,44 @@
 package customsrc
 
 import (
-	"github.com/go-gst/go-gst/gst"
+	"github.com/diamondburned/gotk4/pkg/core/glib"
+	"github.com/go-gst/go-gst/pkg/gst"
 )
 
 // Register needs to be called after gst.Init() to make the gocustomsrc available in the standard
 // gst element registry. After this call the element can be used like any other gstreamer element
 func Register() bool {
-	return gst.RegisterElement(
+	registered := glib.RegisterSubclassWithConstructor[*customSrc](
+		func() *customSrc {
+			return &customSrc{}
+		},
+		glib.WithOverrides[*customSrc, gst.BinOverrides](func(b *customSrc) gst.BinOverrides {
+			return gst.BinOverrides{}
+		}),
+		glib.WithClassInit[*gst.BinClass](func(bc *gst.BinClass) {
+			bc.ParentClass().SetStaticMetadata(
+				"custom test source",
+				"Src/Test",
+				"Demo source bin with volume",
+				"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
+			)
+
+			bc.ParentClass().AddPadTemplate(gst.NewPadTemplate(
+				"src",
+				gst.PadSrc,
+				gst.PadAlways,
+				gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
+			))
+		}),
+	)
+
+	return gst.ElementRegister(
 		// no plugin:
 		nil,
 		// The name of the element
 		"gocustomsrc",
 		// The rank of the element
-		gst.RankNone,
-		// The GoElement implementation for the element
-		&customSrc{},
-		// The base subclass this element extends
-		gst.ExtendsBin,
+		uint(gst.RankNone),
+		registered.Type(),
 	)
 }