- Implement list_ha_groups with full group configuration parsing
- Implement create_ha_group, update_ha_group, delete_ha_group
- Implement list_ha_resources with full resource configuration
- Implement enable_ha_resource and disable_ha_resource
- Implement manage_ha_resource for custom actions
- Implement get_ha_group_status and get_ha_resource_status
- All operations use proper error handling with Option safety
- Add 2 unit tests for HA group and resource serialization