feat(workflows): integration-add command for native integration steps

[chrisaddams]

What

Adds anythink workflows integration-add — a named-flag convenience command (mirroring file-handler-add) for adding Integration steps (Claude, OpenAI, Slack, …) to a workflow without hand-writing the params JSON.

anythink workflows integration-add 154 analyze_ai \
  --provider claude --operation generate-text \
  --credential-source system --model claude-sonnet-4-5-20250929 \
  --input system_prompt="{{ \$anythink.steps.guard.data[0].system_prompt }}" \
  --input prompt="{{ \$anythink.steps.guard.data[0].prompt }}" \
  --on-success 381 --enabled

Why

Integration steps (backend WorkflowAction.Integration) were already creatable via step-add --action Integration --params '{...}' — the --action value is a pass-through string — but that was undocumented and required hand-authoring the snake_case params (provider / operation / credential_source / inputs). This makes it first-class and discoverable.

Changes

• New WorkflowsIntegrationAddCommand with validation (--provider, --operation, credential-source rules, --input key=value / --inputs JSON / --model, --on-success/--on-failure).
• step-add --action help now lists the full action set, including Integration.

Verified

workflows integration-add … --provider claude --operation generate-text … creates a working Integration step (used to wire a Claude analysis step into a report-generation workflow end-to-end).

🤖 Generated with Claude Code