docs: enhance README for better navigation and contributor experience

[Rajith-14]

• Add centered hero header with tagline and quick-links bar

• Add explicit Table of Contents with anchor links

• Add "Why DevTrack?" section with clearer value proposition

• Reformat Roadmap as table with beginner/intermediate/advanced labels

• Add Future Vision sub-section to Roadmap

• Reformat Getting Started steps with bold headers for readability

• Add footer with star CTA and live demo link

[vercel]

@Rajith-14 is attempting to deploy a commit to the PRIYANSHU DOSHI's projects Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

GSSoC Label Checklist 🏷️

@Priyanshu-byte-coder — please apply the appropriate labels before merging:

Difficulty (pick one):

• level:beginner — 20 pts
• level:intermediate — 35 pts
• level:advanced — 55 pts
• level:critical — 80 pts

Quality (optional):

• quality:clean — ×1.2 multiplier
• quality:exceptional — ×1.5 multiplier

Validation (required to score):

• gssoc:approved — counts for points
• gssoc:invalid / gssoc:spam / gssoc:ai-slop — does not score

Type labels (type:*) are auto-detected from files and title. Review and adjust if needed.
Points formula: (difficulty × quality_multiplier) + type_bonus

[github-actions]

Thanks for your first PR on DevTrack! 🎉

A maintainer will review it within 48 hours. While you wait:

• Make sure CI is passing (type-check + lint)
• Double-check the PR description is filled out and the issue is linked
• Feel free to ask questions in Discussions if you need help

If you find DevTrack useful, a ⭐ star on the repo is always appreciated — it helps the project grow and attract more contributors!

[Priyanshu-byte-coder]

Two issues:

1. Missing EOF newline on README.md — add \n after last line.
2. Dynamic badge regression — this PR removes dynamic badges that were previously added (CI status, contributor count, etc.). Please restore those or keep them alongside any new additions.

[Rajith-14]

Two issues:

1. Missing EOF newline on README.md — add \n after last line.
2. Dynamic badge regression — this PR removes dynamic badges that were previously added (CI status, contributor count, etc.). Please restore those or keep them alongside any new additions.

Thanks for the review! I've addressed both issues:

Missing EOF newline — Added a trailing newline at the end of README.md after the closing tag to comply with POSIX conventions and pass lint checks.
Dynamic badge regression — Restored all dynamic badges (Contributors, Last Commit, Open Issues) alongside the existing static badges. No previous badges were removed.

Both fixes are included in the latest commit.