Add Kite — self-hostable webhook relay for monitoring (Monitoring & Status Pages)

Kite is a self-hostable webhook relay for monitoring and alerting.

Features:
- Built-in signature verification for Stripe, GitHub, Slack
- CloudEvents 1.0 standardization
- Sub-10ms median latency
- Agent-native streaming (events to stdin)
- Single binary + Docker deployment

Perfect for sysadmins who need to monitor webhook-based events from services like Stripe (payments), GitHub (deployments), Slack (alerts), etc.

Links:
- Website: https://getkite.sh
- GitHub: https://github.com/lommaj/kite
- Docs: https://getkite.sh/docs

README.md

@@ -489,6 +489,7 @@ _Related: [Metrics & Metric Collection](#metrics--metric-collection)_
 
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