Playwright: Convert sliding-sync test to playwright (#11989)

* Add method to send text message

* Add dockerUrl to HomeServerConfig

* Implement sliding sync proxy

* Convert tests

* Reload page after applying labs feature

* Remove converted files

* Remove timeout

* Remove sliding-sync

* Remove proxy import

* Remove reference to proxy

* wait for load

* Update date

* Convert enableLabsFeature to separate fixture

* Enable feature in fixture

* Skip over config and just write to local-storage

* Rename fixture

* Fix room header test

* Use type inference

* Override config instead of setting localstorage

* Set default language

* Always add labs feature

* Put this one test into a separate describe block

* Move labs lag within describe block

playwright/pages/client.ts

@@ -101,7 +101,7 @@ export class Client {
     }
 
     /**
-     * Send a message as a bot into a room
+     * Send a message into a room
      * @param roomId ID of the room to send the message into
      * @param content the event content to send
      */
@@ -134,6 +134,15 @@ export class Client {
         );
     }
 
+    /**
+     * Send a text message into a room
+     * @param roomId ID of the room to send the message into
+     * @param content the event content to send
+     */
+    public async sendTextMessage(roomId: string, message: string): Promise<ISendEventResponse> {
+        return await this.sendMessage(roomId, { msgtype: "m.text", body: message });
+    }
+
     /**
      * Create a room with given options.
      * @param options the options to apply when creating the room