[sparo] shell completion feature

[chengcyber]

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Have you run rush change for this change?

• Yes
• No

If No, please run rush change before, this is necessary.

If adding a new feature, the PR's description includes:

• Reason for adding this feature
• How to use
• A basic example

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• No

If yes, please describe the impact and migration path for existing applications:

Summary

This PR adds completion feature to Sparo CLI

Detail

Shell completion can improve the user experience when running Sparo commands. This PR leverages yargs's completion feature to support completion for most all commands.

1. To enable completion:

User needs to add eval "$(sparo completion)" to ~/.zshrc file. The "sparo completion" command prints shell script and loaded by the eval command.

Remember to use source ~/.zshrc to make it take effect immediately.

2. To use completion:

I would like to put some show cases here. Just type in the terminal and press "Tab" to trigger completion.

a. Top level sparo command completion

b. sparo add file completion

c. sparo checkout --profile completion

d. sparo checkout --to completion

e. sparo list-profiles --project completion

How to test it

1. Added a build test in this PR for testing the entire completion feature

2. Run the following command to test completion locally:

/path/to/local/sparo --get-yargs-completions sparo <command> ...