add additional test scripts and update readme

bigbluebutton-tests/playwright/README.md

@@ -27,3 +27,20 @@ $ npx playwright test chat --browser=firefox
 or
 $ npm test chat -- --browser=firefox
 ```
+#### Additional commands
+
+To see the tests running visually, you must run them in headed mode:
+```bash
+$ npm run test:headed chat
+```
+
+If you want to run a specific test or a specific group of tests, you can do so with the following command:
+```bash
+$ npm run test:filter "Send public message"
+```
+_(note that this filter needs to be passed in "double quotes")_
+
+You can also use this also through the test tree, adding the test suite / group of tests before the test filter:
+```bash
+$ npm run test:filter "notifications chat"
+```

bigbluebutton-tests/playwright/package.json

@@ -1,6 +1,9 @@
 {
   "scripts": {
-    "test": "npx playwright test"
+    "test": "npx playwright test",
+    "test:filter": "npx playwright test -g",
+    "test:headed": "npx playwright test --headed",
+    "test:debug": "npx playwright test --debug -g"
   },
   "devDependencies": {
     "@playwright/test": "^1.16.3",