rc markdown: Add -insert hook
rc markdown: Add -insert hook

lenormf/kakoune,mawww/kakoune,lenormf/kakoune,mawww/kakoune,jkonecny12/kakoune,lenormf/kakoune,mawww/kakoune,jkonecny12/kakoune,casimir/kakoune,danr/kakoune,lenormf/kakoune,alexherbo2/kakoune,Somasis/kakoune,casimir/kakoune,mawww/kakoune,alexherbo2/kakoune,Somasis/kakoune,alexherbo2/kakoune,danr/kakoune,alexherbo2/kakoune,casimir/kakoune,Somasis/kakoune,danr/kakoune,danr/kakoune,jkonecny12/kakoune,Somasis/kakoune,casimir/kakoune,jkonecny12/kakoune