fix: Remove Extra Space Before and After Group Items#458

RamanaMenda wants to merge 2 commits intodocling-project:maindocling-project/docling-core:mainfrom

RamanaMenda:bugfix/2745_ExtraSpaceBeforeAndAfterGroupItemsRamanaMenda/docling-core:bugfix/2745_ExtraSpaceBeforeAndAfterGroupItemsCopy head branch name to clipboard