feat(integrations): add Agent Enhancer Utilities MCP

[artiehinz]

• A human has tested these changes.

Summary

Adds Agent Enhancer Utilities as a no-auth Streamable HTTP integration. It provides planning, checkpoints, duplicate protection, recovery, and evidence tools for existing workflows.

The change adds one connector, its immutable icon, and the regenerated catalog index.

Issue Number

N/A

How to Test

npm run build:integrations
$env:PYTHONUTF8='1'
uv run --no-group test --with pytest --with jsonschema --with requests pytest tests/test_catalog_schema.py tests/test_integration_catalog_in_sync.py -q

Result: 101 passed. The endpoint also passed MCP initialization. The Windows full-suite setup stopped while building litellm; Linux CI covers the normal full suite.

Video/Screenshots

Metadata-only change. Demo: https://liberated.site/demo.mp4

No account, API key, or secret is required.