docs(federation): 📝 Update SDK documentation

packages/sdk/schemas/extensions/polls.ts

@@ -0,0 +1,22 @@
+import { z } from "zod";
+import { isISOString } from "../../regex.ts";
+import { url, u64 } from "../common.ts";
+import { TextContentFormatSchema } from "../contentformat.ts";
+import { EntitySchema } from "../entity.ts";
+
+export const VoteSchema = EntitySchema.extend({
+    type: z.literal("pub.versia:polls/Vote"),
+    author: url,
+    poll: url,
+    option: u64,
+});
+
+export const PollExtensionSchema = z.strictObject({
+    options: z.array(TextContentFormatSchema),
+    votes: z.array(u64),
+    multiple_choice: z.boolean(),
+    expires_at: z
+        .string()
+        .refine((v) => isISOString(v), "must be a valid ISO8601 datetime")
+        .nullish(),
+});