Add SWT headless fragment for running SWT without a display#2594

Copilot wants to merge 4 commits into

mastereclipse-platform/eclipse.platform.swt:masterfrom

copilot/fix-35fdabc2-1575-48c6-8ba4-cc044882f849eclipse-platform/eclipse.platform.swt:copilot/fix-35fdabc2-1575-48c6-8ba4-cc044882f849Copy head branch name to clipboard