feat!: type auto-generation (#6657)

Types are now auto-generated by default.

You can opt-out of this behavior by setting:
```ts
buildConfig({
  // Rest of config
  typescript: {
    autoGenerate: false
  },
})
```

test/plugin-redirects/config.ts

@@ -1,3 +1,7 @@
+import { fileURLToPath } from 'node:url'
+import path from 'path'
+const filename = fileURLToPath(import.meta.url)
+const dirname = path.dirname(filename)
 import { redirectsPlugin } from '@payloadcms/plugin-redirects'
 
 import { buildConfigWithDefaults } from '../buildConfigWithDefaults.js'
@@ -40,4 +44,7 @@ export default buildConfigWithDefaults({
       },
     }),
   ],
+  typescript: {
+    outputFile: path.resolve(dirname, 'payload-types.ts'),
+  },
 })