Manage stakeholders implemented

lib/create/stakeholderLimits.ts

@@ -0,0 +1,5 @@
+/**
+ * Max stakeholder emails per draft + publish body.
+ * Server: {@link MAX_STAKEHOLDER_EMAILS} in `lib/server/validation/createFlowSchemas.ts` must match.
+ */
+export const MAX_STAKEHOLDER_EMAILS = 30;