run-dev: Suppress the notices made by third-party tools.

This limits the `run-dev.py` startup output.
And made the terminal message a bit more clear about
accessing the server.

Fixes #16846

tools/run-dev.py

@@ -341,7 +341,7 @@ def shutdown_handler(*args: Any, **kwargs: Any) -> None:
 
 def print_listeners() -> None:
     external_host = os.getenv('EXTERNAL_HOST', 'localhost')
-    print(f"\nStarting Zulip on {CYAN}http://{external_host}:{proxy_port}/{ENDC}.  Internal ports:")
+    print(f"\nStarting Zulip on:\n\n\t{CYAN}http://{external_host}:{proxy_port}/{ENDC}\n\nInternal ports:")
     ports = [
         (proxy_port, 'Development server proxy (connect here)'),
         (django_port, 'Django'),

webpack.config.ts

@@ -224,6 +224,16 @@ export default (_env: unknown, argv: {mode?: string}): webpack.Configuration[] =
             },
         },
         plugins: [
+            new webpack.ProgressPlugin({
+                handler(percentage) {
+                    if (percentage === 1) {
+                        console.log(
+                            "\u001B[34mi ｢wdm｣\u001B[0m:",
+                            "Webpack compilation successful.",
+                        );
+                    }
+                },
+            }),
             new DebugRequirePlugin(),
             new BundleTracker({
                 filename: production
@@ -256,6 +266,7 @@ export default (_env: unknown, argv: {mode?: string}): webpack.Configuration[] =
             },
             publicPath: "/webpack/",
             stats: "errors-only",
+            noInfo: true,
         },
     };