docs: Add landing page copy, CodeFling listing, FAQ, and comparison sheet

Marketing assets for launch — landing page copy, marketplace description,
FAQ for support load reduction, and competitive comparison table.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/CODEFLING_DESCRIPTION.md

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+# Corrosion — The Control Plane for Rust Servers
+
+Corrosion is a hosted Rust server management platform that replaces manual config editing, wipe babysitting, and SSH-based administration with a unified cloud dashboard.
+
+Install one plugin. Register online. Manage everything from the web.
+
+---
+
+## Core Features
+
+- Auto-Wiper with Rollback
+- Real-Time Console + Player Control
+- Web-Based Plugin Configuration
+- Automated Steam Updates
+- Companion Agent — No SSH Required
+- Multi-Admin Role-Based Access Control
+- Zero Inbound Ports Required
+
+---
+
+## What Makes Corrosion Different?
+
+Corrosion is not just a plugin.
+
+It's a SaaS control plane built with:
+
+* Rust backend (Axum)
+* NATS JetStream messaging
+* PostgreSQL multi-tenant isolation
+* Outbound-only secure connections
+
+No inbound firewall rules required.
+
+---
+
+## Intelligent Wipe Automation
+
+Corrosion handles full wipe sequences:
+
+* Pre-wipe countdown
+* Backup before wipe
+* Map rotation
+* Steam update
+* Post-wipe health verification
+* One-click rollback
+
+No more manual wipe nights.
+
+---
+
+## Public Server Page Included
+
+Each license includes a public site:
+
+* Live player count
+* Wipe schedule + countdown
+* Server information
+* Optional integrated store
+
+---
+
+## License Model
+
+* One license = one server
+* Unlimited admins (RBAC)
+* License transferable with server
+* Module store planned roadmap
+
+---
+
+Install once. Automate everything. Never SSH again.