refactor(api): ♻️ Move all client schema code to new package

packages/client/schemas/extended-description.ts

@@ -0,0 +1,31 @@
+import { z } from "@hono/zod-openapi";
+
+export const ExtendedDescription = z
+    .object({
+        updated_at: z
+            .string()
+            .datetime()
+            .openapi({
+                description:
+                    "A timestamp of when the extended description was last updated.",
+                example: "2025-01-12T13:11:00Z",
+                externalDocs: {
+                    url: "https://docs.joinmastodon.org/entities/ExtendedDescription/#updated_at",
+                },
+            }),
+        content: z.string().openapi({
+            description:
+                "The rendered HTML content of the extended description.",
+            example: "<p>We love casting spells.</p>",
+            externalDocs: {
+                url: "https://docs.joinmastodon.org/entities/ExtendedDescription/#content",
+            },
+        }),
+    })
+    .openapi({
+        description:
+            "Represents an extended description for the instance, to be shown on its about page.",
+        externalDocs: {
+            url: "https://docs.joinmastodon.org/entities/ExtendedDescription",
+        },
+    });