feat: implemented Block Stack Matrix

[Shrutiii01]

What does this PR do?

This PR introduces "Block-Stack Matrix (Drop-Line Cleansing)", a glassmorphic strategy block puzzle built to resolve the open requirements listed in Issue #178. The implementation leverages a 2D multi-dimensional array grid to execute central-axis matrix rotation transformations, boundary axis containment safety passes, fluid gravity velocity tracking, and persistent score caching via client-side LocalStorage.

Type of change

• New project under Projects/
• Fix or improvement to an existing project
• Showcase page / workflow / docs change

Checklist

• I read CONTRIBUTING.md.
• My folder name is Title Case with real spaces (e.g. To Do Web App).
• My folder contains README.md, project.json and index.html.
• project.json is valid and title matches the folder name.
• The project opens by double-clicking index.html — no build step.
• No console errors, no tracking scripts, no third-party iframes.
• I respect the Code of Conduct.

Linked issue

Closes #178

[github-actions]

Great work and contribution, will be merged soon as NSoc 2026 contribution.