text: Title: Bulk upload workflows from UI
  Body: ## Rationale
  - We only support uploading one workflow as YAML / JSON at a time in the UI.
  - Playbooks are coming back but they span multiple workflows and child workflows.
  
  ## What I want
  Support bulk file uploads.
  
  <img width="937" alt="Image" src="https://github.com/user-attachments/assets/1dc5664b-a1e5-4ea9-833e-421677f1995d" />
  
  ## Implementation details
  - Should support max 10 files at a time with max file upload sizes