docs: Add Troubleshooting section to README for common setup issues

[ankitasahu83964]

Description

The README provides clear installation and usage instructions, but it does not include a troubleshooting section for common setup and execution issues that new contributors may encounter.

Adding a dedicated Troubleshooting section would help users quickly resolve common problems without searching through issues or discussions.

Suggested topics

• Node.js version compatibility (Node.js >= 18)
• npm install dependency installation failures
• Running the project outside a Git repository
• Missing WASM grammars and how to rebuild them
• GitHub Actions workflow troubleshooting
• Common npx dg command errors
• Clearing caches and reinstalling dependencies when builds fail

Expected Changes

• Add a new Troubleshooting section near the end of the README.
• Include short descriptions with recommended fixes for each common issue.
• Keep the solutions concise and beginner-friendly.
• Maintain the existing README formatting and style.

Benefits

• Improves onboarding for new contributors.
• Reduces repetitive support questions.
• Makes the project documentation more comprehensive.

[ankitasahu83964]

Hi @Aryan0628,

I would like to work on this issue as part of EcSoC 2026. The proposed documentation improvement is beginner-friendly, and I'd be happy to add a clear troubleshooting section to the README with common setup issues and their solutions.

Could you please assign this issue to me?

Thank you!

[prasiddhi-105]

hiii @Aryan0628 please assign this issue to me underesoc26!!!
/claim