feat: adding post messages to link unlinked ct to variant group#514

karancs06 wants to merge 5 commits intodevelop_v4contentstack/live-preview-sdk:develop_v4from

VB-530-support-to-link-unlinked-ct-to-variant-groupcontentstack/live-preview-sdk:VB-530-support-to-link-unlinked-ct-to-variant-groupCopy head branch name to clipboard