docs: Add "Migrating from Chai" section (#5549)
docs: Add "Migrating from Chai" section (#5549)

Co-authored-by: Christian Bromann <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@christian-bromann.com>
webdriverio/webdriverio,webdriverio/webdriverio,webdriverio/webdriverio