[Fix] [Portfolio]: Resolve text selection styling in globals.css

[nik1062]

Description

This PR fixes the issue on the portfolio website where text selection was defaulting to the browser's

default highlight color instead of the custom accent colors.

### Changes Made
- Modified `apps/portfolio/app/globals.css`.
- Added `!important` overrides to the `::selection` block to enforce `var(--color-accent)` (background)

and var(--color-accent-ink) (text color).
- Added a universal *::selection selector to ensure the custom selection styling applies globally to
all child elements.

*(Note to reviewer: This is a fresh branch replacing my previous PR to ensure a clean commit history.

The unintended package-lock.json and mock-template-library.mjs files have been completely removed
from the scope of this PR).*

[Gautam25Raj]

Awesome work on this PR @nik1062! 🎉

Thank you for contributing to VeriWorkly. It's always great to see community members taking the initiative to improve the project. I really appreciate the time and effort you put into this contribution.

Keep up the great work, and I hope to see more contributions from you in the future! 🚀