Add agenda service and submit api

Signed-off-by: Asai Neko <sugar@sne.moe>

api/agenda/handler.go

@@ -0,0 +1,18 @@
+package agenda
+
+import (
+	"nixcn-cms/service/service_agenda"
+
+	"github.com/gin-gonic/gin"
+)
+
+type AgendaHandler struct {
+	svc service_agenda.AgendaService
+}
+
+func ApiHandler(r *gin.RouterGroup) {
+	agendaSvc := service_agenda.NewAgendaService()
+	agendaHandler := &AgendaHandler{agendaSvc}
+
+	r.POST("/submit", agendaHandler.Submit)
+}