Error Logging for extension.ts files for fs.readFile

[aws-spenceng]

For extension.ts files - we have fs.readFile functions that silently fail to not block users.

• We should include error logging (console.log, frontend/UI notification to user, etc.)

Original links:

• Initialized patches and applied sagemaker-extension.diff #8 (comment)
• Initialized patches and applied sagemaker-extension.diff #8 (comment)

AWS Toolkit error handling: https://github.com/aws/aws-toolkit-vscode/blob/master/packages/core/src/shared/logger/logger.ts