Add local glTF viewer and visual coverage

Amp-Thread-ID: https://ampcode.com/threads/T-01a02d1c-27fc-7761-9f51-ed97b2dd4e3e
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

server/app.go

@@ -35,7 +35,7 @@ func newApplication(store *playgroundStore, packages map[string]memoryAsset, mon
 		return nil, err
 	}
 	pages := make(map[string][]byte)
-	for _, name := range []string{"home.html", "docs.html", "playground.html"} {
+	for _, name := range []string{"home.html", "docs.html", "playground.html", "gltf.html"} {
 		content, err := webFiles.ReadFile("web/" + name)
 		if err != nil {
 			return nil, err
@@ -63,6 +63,8 @@ func (app *application) routes() http.Handler {
 	mux.HandleFunc("/docs/", app.servePage("docs.html"))
 	mux.HandleFunc("/playground", app.servePlayground)
 	mux.HandleFunc("/playground/", app.servePlayground)
+	mux.HandleFunc("/view/gltf", app.servePage("gltf.html"))
+	mux.HandleFunc("/view/gltf/", app.servePage("gltf.html"))
 	mux.HandleFunc("/", app.serveHome)
 	return app.headers(mux)
 }