Lambda client wrapper

[mwarman]

📢 Instructions

• Begin with a DRAFT pull request.
• Follow italicized instructions to add detail to assist the reviewers.
• After completing all checklist items, change the pull request to READY.

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🔧 Change Summary

Describe the changes included in this pull request. Link to the associated GitHub or Jira issue(s).

• see Lambda client wrapper #13
• Added a wrapper for the AWS SDK LambdaClient which provides a best practices implementation to allow Lambda functions to synchronously or asynchronously invoke other Lambda functions.
• Updated the project documentation.

📝 Checklist

Pull request authors must complete the following tasks before marking the PR as ready to review.

• Complete a self-review of changes
• Unit tests have been created or updated
• The code is free of [new] lint errors and warnings
• Update project documentation as needed: README, /docs, JSDoc, etc.

🧪 Steps to Test

Describe the process to test the changes in this pull request.

1. Implement the Lambda utility in a test project.
2. Deploy the test project to AWS.
3. Test invoking Lambda functions synchronously and asynchronously.

🔗 Additional Information

Optionally, provide additional details, screenshots, or URLs that may assist the reviewer.

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