refactor: reorganize pkl files for better separation of concerns

pkg/nebula/models/Feature.pkl.go

@@ -0,0 +1,12 @@
+// Code generated from Pkl module `models`. DO NOT EDIT.
+package models
+
+type Feature struct {
+	Title string `pkl:"title"`
+
+	Description string `pkl:"description"`
+
+	Icon string `pkl:"icon"`
+
+	Image *Image `pkl:"image"`
+}