feat(nav-links): add hover and active color styles using --vt-c-indigo

[diptipradeep]

Partially resolves issue #1539

This PR implements hover and active color styles for the navigation links (.nav-links) in the portfolio.

Changes included:

• Nav links now change from grey to the --vt-c-indigo color on hover and when active.
• Ensures consistency with the portfolio's color palette and improves UI feedback.

Pending tasks (to be implemented in future PRs):

• Navigation bar layout and responsiveness (desktop + mobile)
• Hamburger menu toggle for mobile
• Button (.btn) styles with hover and accessibility effects
• Consistent spacing using --section-gap

This partial update ensures the navigation links visually respond to user interaction and maintains color consistency with the theme. I will be working on the remaining tasks (responsive nav layout, hamburger toggle, button styles, and spacing) in separate PRs to resolve issue #1539 fully. Thank you!

[diptipradeep]

@microsoft-github-policy-service agree

[diptipradeep]

Hello maintainers, I have fixes #1539 created this PR — “feat(nav-links): add hover and active color styles using --vt-c-indigo” — as part of Hacktoberfest 2025. If it aligns with the project’s standards, could you kindly consider adding the hacktoberfest-accepted label? Thank you !

[omsuneri]

@diptipradeep the changes look pretty clean and no need to make another PR just push more commits to the same branch and they will be up here in this PR only !!