Add docs-check-links.yml and docs-check-links.sh files in .github/workflows#3831

slevis-lmwg wants to merge 2 commits intoESCOMP:b4b-devESCOMP/CTSM:b4b-devfrom

slevis-lmwg:wkflow_check_links_in_docslevis-lmwg/ctsm:wkflow_check_links_in_docCopy head branch name to clipboard