feat(skills): Add Cloud apps skill

[nbverboven-webflow]

Summary

• provide outcome-oriented workflows for creating, inspecting, troubleshooting, and administering Webflow Cloud apps through MCP
• support standalone and site-attached GitHub apps, repository changes, environment mappings, deployments, domains, logs, and configuration checks
• define safe mutation workflows using previews, explicit confirmation, idempotency, deployment attribution, and uncertain-result reconciliation
• protect secret-bearing configuration by exposing only key metadata and delegating value writes to the Webflow CLI
• keep local-source app creation and deployment in the CLI while using MCP for GitHub-source workflows
• rely on the live MCP guide and action schemas for generic tool mechanics, retaining only Cloud-specific decisions and safety boundaries

Why

Operating a Webflow Cloud app requires coordinating apps, environments, GitHub sources, deployments, logs, routes, domains, and configuration. These resources have separate lifecycles, and mutation results may be asynchronous, partial, or ambiguous. This skill organizes the MCP capabilities around operational outcomes so agents can resolve the correct target, distinguish evidence from inference, and keep repository, environment, configuration, and deployment changes separate.

Cloud operations can affect live traffic, deployed code, persistent resources, and secret-bearing configuration. The skill defines the Cloud-specific confirmation, idempotency, attribution, and reconciliation boundaries needed to perform those operations safely. It preserves partial resources, prevents secret exposure, and delegates local-source workflows and environment-variable values to the Webflow CLI while leaving generic MCP mechanics to the live guide and action schemas.

Linear: CLOUD-273

[linear-code]

CLOUD-273