adds zod API validation

web/src/lib/models/api/trail_share_schema.ts

@@ -0,0 +1,16 @@
+import { z, ZodType } from "zod";
+import type { TrailShare } from "../trail_share";
+
+const TrailShareCreateSchema = z.object({
+    user: z.string().length(15),
+    trail: z.string().length(15),
+    permission: z.enum(["view", "edit"])
+
+}) satisfies ZodType<TrailShare>
+
+const TrailShareUpdateSchema = z.object({
+    permission: z.enum(["view", "edit"])
+}) satisfies ZodType<Partial<TrailShare>>
+
+
+export { TrailShareCreateSchema, TrailShareUpdateSchema };