Upgrade Flue to 0.11.1

[markphelps]

Summary

• upgrade @flue/runtime and @flue/cli to 0.11.1
• raise Node floor to 22.18.0 and update docs/action metadata
• migrate removed @flue/runtime/app import to 0.11-compatible imports

Validation

• pnpm build
• npx -p typescript tsc --noEmit -p tsconfig.json
• pnpm exec flue docs search routing

Notes

• Live GitHub smoke test was skipped because no explicit safe repo/PR was supplied.

[github-actions]

Verdict: approve

This PR upgrades all Flue runtime and CLI packages to 0.11.1, raises the Node.js engine floor to 22.18.0, and updates related documentation and CI definitions accordingly. All modifications are correct, aligned across files, and have addressed prior reviewer feedback. No further changes requested.

🤖 Automated review by the Flipt PR review agent.

[markphelps]

Addressed the AGENTS.md note in d0cea5e by changing the runtime line to the exact engine-style floor: Node >=22.18.0.

Validation rerun:

• pnpm build
• npx -p typescript tsc --noEmit -p tsconfig.json