feat: add Role type for RBAC

surfsense_web/contracts/types/rbac.types.ts

@@ -0,0 +1,14 @@
+import { z } from "zod";
+
+export const role = z.object({
+	id: z.number(),
+	name: z.string().min(1).max(100),
+	description: z.string().max(500).nullable(),
+	permissions: z.array(z.string()),
+	is_default: z.boolean(),
+	is_system_role: z.boolean(),
+	search_space_id: z.number(),
+	created_at: z.string(),
+});
+
+export type Role = z.infer<typeof role>;