feat(amazonq): Add command to generate unit tests for selected code

[bweedop]

Adds command to Amazon Q to generate unit tests for selected code. The feature will be limited to internal Amazon users to collect usage metrics and, subsequently, will be released to all users.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)

Description

• Adds "Test" command to context menu (with a (Beta) suffix for while internal only). The command will send the selected code to the chat with the following prompt: "Generate unit tests for the following part of my code for me:"

Checklist

• [X] My code follows the code style of this project
• [ ] I have added tests to cover my changes
• [] A short description of the change has been added to the CHANGELOG if the change is customer-facing in the IDE.
• [ ] I have added metrics for my changes (if required)

License

I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions[bot]]

This pull request modifies files in src/ but no tests were added/updated. Confirm whether tests should be added or ensure the PR description explains why tests are not required.

[github-actions[bot]]

This pull request modifies a feature or fixes a bug, but it does not include a changelog entry. All pull requests that introduce new features or bug fixes must have a corresponding changelog item describing the changes.

[github-actions[bot]]

This pull request modifies code in src/ but no tests were added/updated. Confirm whether tests should be added or ensure the PR description explains why tests are not required.

[github-actions[bot]]

This pull request implements a feature or fix, so it must include a changelog entry. See CONTRIBUTING.md#changelog for instructions.