Implement GitHub Actions for HTML/CSS Validation

[Calimix]

Explanation:
Workflow Name: Indicates that this workflow is for validating HTML and CSS.
Triggers: The workflow runs on pushes and pull requests to the main branch, as well as manually.
Job: A single job named validate runs on Ubuntu.

Steps:

• Check out the code from the repository.
• Set up Node.js.
• Install the necessary packages for HTML and CSS validation tools.
• Run HTML validation with HTMLHint.
• Run CSS validation with Stylelint.

[Calimix]

Integrate pnpm for HTML and CSS Validation in GitHub Actions

Key Addition:
Caching Step: The Cache pnpm step caches the pnpm store, speeding up future runs.

[Calimix]

Integrate pnpm for HTML and CSS Validation in GitHub Actions

Key Additions:

1. Caching Step: The Cache pnpm step caches the pnpm store, speeding up future runs. (previous implementation)

2. Error Handling with set -e: This ensures that the script exits immediately if any command fails.

3. Logging Errors:

• HTML validation errors are logged to html_validation_errors.log.
• CSS validation errors are logged to css_validation_errors.log.

4. Error Check: After each validation step, the script checks if the log file is empty. If it contains errors, a message is printed, and the workflow exits with a non-zero status.

This setup will help track validation issues effectively while ensuring the workflow fails on errors.