extract authors schema into its own file

src/content/config.ts

···
 import { defineCollection, z, reference } from "astro:content";
 
-const fallback = z.object({
-  icon: z.string().url(),
-  displayText: z.string(),
-  href: z.string().url(),
-}).partial({ icon: true });
-
-const authors = defineCollection({
-  type: "content",
-  schema: z.object({
-    first_name: z.string(),
-    last_name: z.string(),
-    nick_name: z.string(),
-    funding: z.object({
-      amazon: z.string().url(),
-      github: z.string(),
-      kofi: z.string(),
-      patreon: z.string(),
-      polar: z.string(),
-    }).catchall(fallback).partial(),
-    social: z.object({
-      github: z.string(),
-      gitlab: z.string(),
-      linkedin: z.string(),
-      twitter: z.string(),
-    }).catchall(fallback).partial(),
-    web: z.object({
-      homepage: z.string().url(),
-    }).catchall(fallback).partial(),
-  }).partial().required({ nick_name: true }),
-});
+import { authors } from "./schemas/authors";
 
 const blog = defineCollection({
   type: "content",

src/content/schemas/authors.ts

···
+import { defineCollection, z } from "astro:content";
+
+const catchall = z.object({
+  icon: z.string().url(),
+  displayText: z.string(),
+  href: z.string().url(),
+}).partial({ icon: true });
+
+const funding = z.object({
+  amazon: z.string().url(),
+  github: z.string(),
+  kofi: z.string(),
+  patreon: z.string(),
+  polar: z.string(),
+}).catchall(catchall).partial();
+
+const social = z.object({
+  github: z.string(),
+  gitlab: z.string(),
+  linkedin: z.string(),
+  twitter: z.string(),
+}).catchall(catchall).partial();
+
+const web = z.object({
+  homepage: z.string().url(),
+}).catchall(catchall).partial();
+
+const schema = z.object({
+  first_name: z.string(),
+  last_name: z.string(),
+  nick_name: z.string(),
+  funding,
+  social,
+  web,
+}).partial().required({ nick_name: true });
+
+export const authors = defineCollection({
+  type: "content",
+  schema,
+});