Add WhereMyTokens to Usage & Observability

[jeongwookie]

Summary

Adds WhereMyTokens to the 📊 Usage & Observability section.

• Repo: https://github.com/jeongwookie/WhereMyTokens
• Category: Usage & Observability
• Description: Windows system tray app for real-time Claude Code token usage, costs, rate limits, and session tracking.

What it does

• Live session list with status indicators (active / waiting / idle / compacting)
• Rate limit bars (5h and 1w) from the Anthropic API with countdown timers
• Registers as a Claude Code statusLine plugin for live data via stdin (no polling)
• Per-session context window warnings (50% / 80% / 95%+) and tool usage breakdown
• Activity heatmaps, model cost breakdown, Windows toast alerts
• Always-on-top widget with global hotkey; tray label shows %, tokens, or cost

MIT licensed. Pre-built portable .exe available.