feat: add CoopCredits Solana media rewards ecosystem

Add complete  token system with Plex/Tautulli/Overseer integration:
- Anchor program for SPL token mint/burn/transfer
- Express backend with OAuth, webhooks, Solana integration
- Next.js frontend with dashboard, admin panel, wallet management
- Docker deployment for 172.20.1.0/24 infrastructure
- Production configs with SSL, Nginx, health monitoring

Tautulli webhooks auto-mint  on watch events.
Overseer integration burns  for content requests.

frontend/.env.local.example

@@ -0,0 +1,10 @@
+# API
+NEXT_PUBLIC_API_URL=http://localhost:3001
+
+# Solana
+NEXT_PUBLIC_SOLANA_NETWORK=devnet
+NEXT_PUBLIC_SOLANA_RPC_URL=https://api.devnet.solana.com
+
+# App
+NEXT_PUBLIC_APP_NAME=CoopCredits
+NEXT_PUBLIC_APP_URL=http://localhost:3000