refactor: rename DTree to DValue

site/examples/uce-starter/views/auth/demo.uce

@@ -2,12 +2,12 @@
 
 COMPONENT(Request& context)
 {
-	DTree asset_props;
+	DValue asset_props;
 	asset_props["css"]["0"] = "views/marketing.css";
 	print(component("../../components/theme/assets", asset_props, context));
 	context.call["app"]["page_title"] = "Auth";
 
-	DTree props;
+	DValue props;
 	props["title"] = "Sign In to Your Account";
 	props["subtitle"] = "Choose your preferred authentication method to continue";
 	props["google_client_id"] = "YOUR_GOOGLE_CLIENT_ID";

site/examples/uce-starter/views/auth/store-oauth-session.uce

@@ -4,8 +4,8 @@ COMPONENT(Request& context)
 {
 	context.call["app"]["page_type"] = "json";
 
-	DTree response;
-	DTree body = json_decode(context.in);
+	DValue response;
+	DValue body = json_decode(context.in);
 	if(context.params["REQUEST_METHOD"] == "POST" && body["oauth_service"].to_string() != "" && body["oauth_state"].to_string() != "")
 	{
 		context.session["oauth_service"] = body["oauth_service"].to_string();