Spinner for `!terraform.output` @milldr (#947)
what
- Created a charmbracelet spinner when loading terraform output with
!terraform.output - Added success/failure indicators for terraform output operations
- Improved user feedback during terraform output operations
why
- Provides visual feedback during potentially long-running terraform output operations
- Maintains consistency with other Atmos operations (like vendoring) that use spinners
- Improves user experience by clearly indicating:
- When an operation is in progress
- When an operation succeeds (✓)
- When an operation fails (✗)
- Makes it clear which component and stack is being queried for outputs
