ci: Add automated quality validation checks using HTMLHint and Stylelint

[DebasmitaBose0]

Problem

Currently, the CI workflow only echoes a text string and does not validate the HTML structure or CSS styles, making it easy to merge syntax bugs or invalid declarations.

Current Behavior

The .github/workflows/ci.yml runs a single step that runs echo "CI running successfully".

Why This Improvement Is Needed

Automated linting ensures code quality, prevents syntax errors, and maintains consistent styling standards before PRs are merged.

Proposed Solution

Add automated HTMLHint and Stylelint steps to the GitHub actions workflow.

Expected Outcome

Failed HTML structures or invalid CSS attributes will block CI runs on pull requests automatically.

[Meenbudha]

i would like to work on this can you assign to me