feat: pass a new res.locals.params object to http-incoming

This is in line with Fastify podlet and layout which provide reply.app.params to http-incoming.
It is not, however, in line with Podium layout which passes the whole res.locals object. Passing
the whole res.locals object can cause circular reference issues since we set http-incoming on res.locals.podium as well and should be changed.

lib/podlet.js

@@ -903,7 +903,10 @@ export default class PodiumPodlet {
      */
     middleware() {
         return async (req, res, next) => {
-            const incoming = new HttpIncoming(req, res);
+            // initialise res.locals.params so that it can be added to anywhere including in route hooks
+            // or middleware added after this middleware
+            res.locals.params = res.locals.params || {};
+            const incoming = new HttpIncoming(req, res, res.locals.params);
             // @ts-ignore
             incoming.url = new URL(
                 req.originalUrl,

tests/podlet.js

@@ -1303,6 +1303,24 @@ tap.test('.view() - append a custom wireframe document - should render developme
     await server.close();
 });
 
+tap.test('.view() - append a custom wireframe document - should render development output with custom wireframe document', async (t) => {
+    const options = { ...DEFAULT_OPTIONS, development: true };
+
+    const podlet = new Podlet(options);
+    podlet.view((incoming, data) => `<div data-foo="${incoming.params.foo}">${data}</div>`);
+
+    const server = new FakeExpressServer(podlet, (req, res) => {
+        res.locals.params.foo = 'bar';
+        res.podiumSend('<h1>OK!</h1>');
+    });
+
+    await server.listen();
+    const result = await server.get({ raw: true });
+
+    t.equal(result.response, '<div data-foo="bar"><h1>OK!</h1></div>');
+    await server.close();
+});
+
 // #############################################
 // .metrics()
 // #############################################