Fix: Unable to skip overwriting local snapshot using one line command

[dinhtungdu]

Description of the Change

This PR applies the approach of --include_files to the --overwrite_local_copy flag to make it skippable without prompt.

Verification Process

1. cd to a WordPress directory.
2. Pull a snapshot using wp pull <snapshot_id>.
3. See the prompt whether to overwrite the local snapshot.
4. Ctrl-C to abort the command.
5. Pull a snapshot using wp pull <snapshot_id> --overwrite_local_copy=false.
6. See the pull runs without overwrite local copy prompt.

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

Closes #85.

Changelog Entry

Fixed: Allow skipping --overwrite_local_copy without prompt.

[jeffpaul]

@eugene-manuilov @tlovett1 let me know if there's intent to take action on this PR or if we should close it out?