Add hot reload functionality to development script

- Add 'reload' command for quick plugin updates
- Plugin files are copied to running server without restart
- Manual /reload command required in server console
- Safer alternative to full restart for development

🤖 Generated with [Claude Code](https://claude.ai/code)

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

dev-server.sh

@@ -59,6 +59,15 @@ case "${1:-start}" in
         echo "💡 To detach: Press Ctrl+P then Ctrl+Q"
         docker attach minecraft-dev-server
         ;;
+    "reload")
+        echo "🔄 Hot reloading plugin..."
+        build_plugin
+        echo "📦 Copying plugin to server..."
+        docker cp target/scala-2.13/minecraft-scala-plugin_2.13-1.0.0.jar minecraft-dev-server:/minecraft/plugins/minecraft-scala-plugin.jar
+        echo "🔌 Reloading plugins in server..."
+        docker exec minecraft-dev-server bash -c 'echo "reload" > /tmp/reload_cmd' || echo "⚠️  Use '/reload' command in server console for hot reload"
+        echo "✅ Plugin copied! Use '/reload' in server console to apply changes"
+        ;;
     "rebuild")
         echo "🔨 Rebuilding everything..."
         build_plugin
@@ -68,7 +77,7 @@ case "${1:-start}" in
         echo "✅ Complete rebuild finished!"
         ;;
     *)
-        echo "Usage: $0 {start|stop|restart|logs|console|attach|rebuild}"
+        echo "Usage: $0 {start|stop|restart|logs|console|attach|reload|rebuild}"
         echo ""
         echo "Commands:"
         echo "  start   - Build plugin and start server"
@@ -77,6 +86,7 @@ case "${1:-start}" in
         echo "  logs    - View server logs"
         echo "  console - Connect to server console (bash)"
         echo "  attach  - Attach to Minecraft server console"
+        echo "  reload  - Hot reload plugin (requires manual /reload)"
         echo "  rebuild - Complete rebuild (server + plugin)"
         exit 1
         ;;