feat(project): add bannerUrl field and bannerUrl+thumbnailUrl defaults to Project
feat(project): add bannerUrl field and bannerUrl+thumbnailUrl defaults to Project

Project can now store strings for bannerUrls. Has gray defaults for thumnailUrl and bannerUrl
fields.

none

therebelrobot/brigadehub,therebelrobot/brigadehub,sfbrigade/brigadehub,sfbrigade/brigadehub