[ENG-1547] Add relation type editing via click on existing arrows#909

trangdoan982 wants to merge 2 commits intomainDiscourseGraphs/discourse-graph:mainfrom

eng-1547-implement-relation-creation-via-drag-handles-in-tldrawDiscourseGraphs/discourse-graph:eng-1547-implement-relation-creation-via-drag-handles-in-tldrawCopy head branch name to clipboard