fix: emit 'event' catch-all on CDPSession; add test

The JS CDPSession fires two events per CDP protocol event:
  this.emit(event.method, event.params)  // method-specific
  this.emit('event', event)              // catch-all with { method, params }

Java was only firing the method-specific one. Add the missing
listeners.notify("event", parameters) call so on("event", handler)
receives every CDP event as { method, params }.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: yury-s

playwright/src/main/java/com/microsoft/playwright/impl/CDPSessionImpl.java

@@ -45,6 +45,7 @@ void handleEvent(String event, JsonObject parameters) {
         params = parameters.get("params").getAsJsonObject();
       }
       listeners.notify(method, params);
+      listeners.notify("event", parameters);
     } else if ("close".equals(event)) {
       typedListeners.notify(EventType.CLOSE, this);
     }

playwright/src/test/java/com/microsoft/playwright/TestBrowserContextCDPSession.java

@@ -155,6 +155,26 @@ void shouldAddMultipleEventListeners() {
     assertEquals(2, events.size());
   }
 
+  @Test
+  void shouldEmitEventForEachCDPEvent() {
+    CDPSession client = page.context().newCDPSession(page);
+    client.send("Network.enable");
+    List<JsonObject> events = new ArrayList<>();
+    client.on("event", events::add);
+    page.navigate(server.EMPTY_PAGE);
+    assertTrue(events.size() > 0);
+    JsonObject requestEvent = null;
+    for (JsonObject e : events) {
+      if ("Network.requestWillBeSent".equals(e.get("method").getAsString())) {
+        requestEvent = e;
+        break;
+      }
+    }
+    assertNotNull(requestEvent);
+    assertEquals(server.EMPTY_PAGE,
+      requestEvent.getAsJsonObject("params").getAsJsonObject("request").get("url").getAsString());
+  }
+
   @Test
   void shouldRemoveEventListeners() {
     CDPSession cdpSession = page.context().newCDPSession(page);