TypeScript refresh

[josh-demuth]

Refresh of some of the TypeScript workshop content. This is from an AWS TFC project. This includes:

• updating the lib/cdk-workshop-stack.ts code to match how the latest version of the cdk init command imports the main cdk package and uses Constructs instead of App types.
• also includes notices for issues we've seen participants run into when running the workshop (i.e. a blurb about package-lock.json and how to fix issues that may come up).
• updated screenshots for Lambda test instructions due to recent console changes.
• included the Dynamo removal policy from the beginning due to this [cli] Change sets that consist only of removalPolicy changes cannot be executed  aws/aws-cdk#11521 which won't remove the table with the current instructions.
• updated a few git commands since existing ones did not catch any new files that needed to be tracked by git.
• other minor updates to instructions

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By submitting this pull request, I confirm that my contribution is made under the terms of the MIT-0 License.

[indrora]

Well then.

After merging in a lot of small community contributions, much of the content here is in conflict. This is also a very large change overall, with lots of fixes elsewhere.

Could you please rebase this change against the current main branch and verify your changes?

[github-actions]

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