progress bar or spinner for local UI components codegen

### Describe the feature you'd like to request

when Codegen kicks in the Amplify cli, Amplify UI components get synced with the cloud and get generated locally.
If there are lot of components in the UI library the CLI can take time and would appear to hang.
providing spinner or progress bar would improve the experience

### Describe your use case and how the feature would improve your experience.

would improve DX showing a progress bar or spinner to show that underlying processes are occurring

### Describe alternatives you've considered

none

### Additional context

_No response_

The issue names no files, tests, or entry points. Start by locating the Amplify CLI Codegen flow for local UI components and determine where cloud sync and generation begin and end; done means users see activity feedback while the process runs.

Written by the indexing model from the issue text.