Add wRTC Quickstart Guide

[ayaanngandhi]

• Created docs/wrtc.md with comprehensive wRTC documentation
• Added anti-scam checklist with mint verification steps
• Included step-by-step guides for buying on Raydium
• Added BoTTube bridge instructions (deposit and withdraw)
• Added FAQ section
• Updated README to link to the new guide

Closes #58

[Scottcjn]

Thanks for the submission. Closing this as duplicate/noise for payout triage.

Why: this overlaps existing wRTC onboarding work already under review, and several quickstart PRs reference bounty #58 which is now a red-team consensus bounty (not docs).

How to get paid next round:

1. Submit a focused follow-up diff that adds missing proof/screenshots to the accepted onboarding doc path
2. Or pick another active bounty with distinct scope: feat: Add BoTTube <-> RustChain Bridge Daemon #99 (challenge), feat: Add Windows Installer for RustChain Miner #100 (discovery), fix(security): harden /wallet/transfer/signed validation & error handling #103 (X + BoTTube), fix(explorer): prevent XSS in dashboard rendering #124 (profile avatar+bio), [BOUNTY] Security Red Team - Vulnerability Scanner (#57) #72 docs items not yet covered
3. Include claim format + RTC wallet + verification evidence in the bounty issue

Keep participating. Quality submissions that meet scope and proof requirements are paid.