playwright-common utilities for handling toasts (#33119)

* playwright-common utilities for handling toasts

* Set element-web-playwright-common version to 3.1.0

* Add comments to explain the linear hierarchy of fixtures

packages/playwright-common/package.json

@@ -1,7 +1,7 @@
 {
     "name": "@element-hq/element-web-playwright-common",
     "type": "module",
-    "version": "3.0.0",
+    "version": "3.1.0",
     "license": "SEE LICENSE IN README.md",
     "repository": {
         "type": "git",