docs(api): point the workflow guide at the Sim skills

Author: waleedlatif1

apps/docs/content/docs/api-reference/build-and-run-workflows.mdx

@@ -309,6 +309,8 @@ Use `describe_operation` for the current request schema instead of copying one i
 
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+Coding agents that use the CLI can install the [Sim skills](https://github.com/simstudioai/skills), which teach this loop step by step (`bunx skills add simstudioai/skills --global`).
+
 ## Related docs
 
 - [Apply workflow operations](/api-reference/workflows/applyWorkflowOperations)