Create IDE Workflow Documentation

[patdhlk]

Description

Document the experience of editing requirements in VS Code, highlighting the basic experience and how ubCode enhances it.

Acceptance Criteria

• Create docs/how-to-guides/ide-workflow.rst
• Cover basic VS Code + RST editing:
  • Recommended extensions (free)
  • Basic snippets for needs
  • Preview limitations
• Add section "Enhanced IDE Experience with ubCode":
  • Autocomplete for need types and links
  • Real-time validation
  • Need preview panel
  • Refactoring support (rename IDs)
  • Jump to linked needs
• Include side-by-side screenshots if possible