add tags validaiton

client/src/Validation/tag.ts

@@ -0,0 +1,10 @@
+import { z } from "zod";
+
+export const tagSchema = z.object({
+	name: z.string().min(1, "Please enter a tag name"),
+	color: z
+		.string()
+		.regex(/^#([0-9a-fA-F]{6})$/, "Color must be a 6-digit hex value (e.g. #13715B)"),
+});
+
+export type TagFormData = z.infer<typeof tagSchema>;