Enhance deployment script with validation and user feedback

[richardcmckinney]

Summary of Changes:

• Added checks for the presence of necessary command-line tools (sbt, aws, cp) before the execution of the script. This ensures that the script fails early with an informative message if a required tool is not available, guiding the user to resolve the issue before proceeding.

• Implemented input parameter validation to ensure that the script is called with exactly three arguments. This prevents the script from running with incomplete parameters, which could lead to unexpected behavior.

• Introduced more descriptive variable names (S3_BUCKET_PATH, CLOUDFRONT_DISTRIBUTION_ID, ABSOLUTE_URL) to improve code readability and maintainability.

• Included informational log messages to provide users with feedback about the script's execution process. These messages make the script more user-friendly by indicating the current action and any successful completions or errors that occur.

• Removed the final comment in the code, as the additional tests and checks now cover all aspects of the deployment process.

These enhancements make the script safer to use by preventing misconfigurations and providing clearer instructions to the user, both in terms of the script's requirements and its runtime operations.

[CLAassistant]

All committers have signed the CLA.

[TheBizzle]

Closing for inactivity.