fix: join field description, custom components and loading state (#9703)

- [fix: join field shows loading when creating a
document](9f7a2e7936)
- [fix: join field
descriptions](90e8cdb464)
- [feat(ui): adds before & after inputs to join
field](19d43329ad)

---------

Co-authored-by: Patrik <patrik@payloadcms.com>

test/joins/config.ts

@@ -22,6 +22,11 @@ const filename = fileURLToPath(import.meta.url)
 const dirname = path.dirname(filename)
 
 export default buildConfigWithDefaults({
+  admin: {
+    importMap: {
+      baseDir: path.resolve(dirname),
+    },
+  },
   collections: [
     Posts,
     Categories,