Feat: View + Manage Pipeline (#53)

This MR adds the `.pipeline()` command which opens up the pipeline popup. This popup shows information about the current pipeline and it's jobs, and gives users the ability to re-trigger failed jobs.

cmd/main.go

@@ -40,6 +40,7 @@ func main() {
 	m.Handle("/comment", withGitlabContext(http.HandlerFunc(CommentHandler), c))
 	m.Handle("/reply", withGitlabContext(http.HandlerFunc(ReplyHandler), c))
 	m.Handle("/members", withGitlabContext(http.HandlerFunc(ProjectMembersHandler), c))
+	m.Handle("/pipeline", withGitlabContext(http.HandlerFunc(PipelineHandler), c))
 
 	port := fmt.Sprintf(":%s", os.Args[3])
 	server := &http.Server{