chore: prepare release 1.56 - create branches and update version to 1.56.0#1850

Copilot wants to merge 3 commits intomainmicrosoft/playwright-java:mainfrom

copilot/cut-release-1-56-and-maven-updatemicrosoft/playwright-java:copilot/cut-release-1-56-and-maven-updateCopy head branch name to clipboard