Code editor: convert examples to TypeScript

[jenny-s51]

Describe the issue. What is the expected and unexpected behavior?
The examples for the Code editor component need to be converted to TypeScript and functional components.

Please provide the steps to reproduce. Feel free to link CodeSandbox or another tool.

N/A

Is this a bug or enhancement? If this issue is a bug, is this issue blocking you or is there a work-around?
Enhancement

What is your product and what release version are you targeting?
N/A