Open Agent Builder upstream source

Repository: https://github.com/firecrawl/open-agent-builder
Upstream commit: be856e57f8126e90915c898f473dc94fbaefc945

Hermes policy:
- Keep this source aligned with upstream Open Agent Builder behavior.
- Do not add Hermes lead-intake demo workflows, chat helpers, or dashboard-only mock data here.
- Hermes-specific changes should be limited to isolated theme overrides and local self-host wiring.
