[WIP] Add hello world example

[Copilot]

Plan for creating a Hello World VS Code Extension example:

• Analyze existing hello world samples to understand the pattern
• Create a new simple hello world example or enhance existing one
• Ensure the example follows repository standards (TypeScript, ESLint, etc.)
• Add proper documentation (README.md)
• Test the extension to ensure it works
• Verify linting and build processes work correctly

Note: The problem statement is quite vague ("Hello world"). Will create a simple hello world extension that demonstrates the basic VS Code extension API.

Original prompt

Hello world

Created from VS Code via the GitHub Pull Request extension.

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