feat: Implement POST endpoint for discussions API
feat: Implement POST endpoint for discussions API

eduNEXT/edx-platform,angelapper/edx-platform,eduNEXT/edx-platform,eduNEXT/edunext-platform,EDUlib/edx-platform,angelapper/edx-platform,arbrandes/edx-platform,angelapper/edx-platform,edx/edx-platform,EDUlib/edx-platform,arbrandes/edx-platform,eduNEXT/edx-platform,arbrandes/edx-platform,edx/edx-platform,EDUlib/edx-platform,arbrandes/edx-platform,eduNEXT/edunext-platform,EDUlib/edx-platform,eduNEXT/edunext-platform,angelapper/edx-platform,edx/edx-platform,edx/edx-platform,eduNEXT/edx-platform,eduNEXT/edunext-platform