🛠️ Add scaffolding for Synology Docker deployment

resources/prompts/scaffold-synology-docker-deploy.prompt.md

@@ -0,0 +1,19 @@
+---
+name: "scaffold-synology-docker-deploy"
+description: "Scaffold Docker packaging and Synology SSH deployment files into a project with dry-run or apply mode."
+agent: "agent"
+tools: [read, search, execute, edit]
+argument-hint: "project-root=<path> service=<name> stack=<auto|node|python|generic> mode=<dry-run|apply> app-port=<port> container-port=<port>"
+---
+
+Scaffold a target project for Synology Docker deployment by running the shared
+script.
+
+Requirements:
+
+- Use `resources/scripts/scaffold-synology-deploy.sh` instead of manually
+  writing files.
+- Resolve missing required arguments before execution.
+- Default to `--mode dry-run` unless the user explicitly asks for apply mode.
+- Summarize created or updated files and the next command to run in the target
+  project.