feat: add help flag to display usage information and available tools

[abusnitsky]

What does this PR do?

Adds support for --help and -h in the CLI startup flow.
When either flag is provided, the app now prints:

• short usage instructions and CLI description
• the list of available tools with their descriptions

Then it exits cleanly without starting the interactive chat loop.

Type of change

• Bug fix
• New feature / tool
• Documentation update
• Refactor

How to test it

1. Run node src/index.js --help.
2. Confirm help text is printed (usage + available tools).
3. Confirm the process exits immediately.
4. Run node src/index.js -h and verify the same behavior.

Related issues

Closes #15

[vercel]

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[HoussemEddineChaouch]

Hi @abusnitsky,

Please verify that node index.js -h is working. During testing, I got a "Cannot find module 'index.js'" error. Please fix the issue and push the changes again for review.

Also, I think there are a few useful enhancements we could add, such as:

• Displaying the ASCII codes for the returned text.
• Improving the overall output structure and formatting to make it clearer and easier to read.

Thanks!

[abusnitsky]

@HoussemEddineChaouch sorry, node index.js -h is a typo in the PR, you need to run node src/index.js -h from the root.

[HoussemEddineChaouch]

@HoussemEddineChaouch sorry, node index.js -h is a typo in the PR, you need to run node src/index.js -h from the root.

Fix the PR template in the How to test it section. Also, before merging it, please improve the user experience by making the *help * return more noticeable. Add morestyling, such as ASCII colored output, background colors, following the style already used in the current CLI.

[abusnitsky]

@HoussemEddineChaouch I improved the structure and formatting, and added a bit of color.

[HoussemEddineChaouch]

Hey @abusnitsky, clean and well-structured implementation!

One small request before merging, could you extract
the printHelp() function into its own file e.g.
src/help.js and import it in index.js?

This keeps index.js thin and makes help easy to extend
or reuse in the future. please also update the readme with this new feature .

[abusnitsky]

could you extract the printHelp() function into its own file e.g. src/help.js and import it in index.js?

Done. I think we should also introduce a settings file where we can store constants like colors.

[HoussemEddineChaouch]

could you extract the printHelp() function into its own file e.g. src/help.js and import it in index.js?

Done. I think we should also introduce a settings file where we can store constants like colors.

Great, thanks!

On the settings/constants file , good idea but let's
keep it out of this PR. This PR is focused on the
--help flag, let's merge it clean and open a separate
issue for the constants refactor so it can be
discussed and done properly.