Function loadFolderConfig

loadFolderConfig(dir: string): Promise<FolderConfig>
Load folder-level configuration

Loads .mj-folder.json file that contains default values to be applied to all entities in this folder and its subfolders. Used for cascading defaults in deep directory structures.
Parameters
- dir: string
  Directory path to load configuration from
Returns Promise<FolderConfig>
Promise resolving to FolderConfig if found and valid, null otherwise
Example
```
const folderConfig = await loadFolderConfig('./templates');
if (folderConfig?.defaults) {
  // Apply folder defaults to records
}
```
- Defined in packages/MetadataSync/src/config.ts:419