* Improve the toasts fixture of the playwright-common tools
* Increase @element-hq/element-web-playwright-common version to 3.2.0
* Default to 2 second wait for IfExists variants
* Set playwright-common version to 4.0.0 due to breaking change
* Move handleToast into a free function
* Rename handleToast to clickToastButton
* Document new param on clickToastButton
* 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
Andy Balaam