DEVDOCS-6254 - Content Refresh - "Order" (S2S)

[bc-Vince]

Reformatted file.
Added new copy.
Added missing fields.
Called out independent Companies behavior considerations and legacy extra fields

DEVDOCS-6254

What changed?

• Introduction includes helpful general information, including some of the uncommon fields shared among endpoint responses.
• Endpoints now include summaries with usage information
• Request and response bodies are up-to-date, showing all available fields and parameters
• YAML file is organized into several schema to reduce redundant text lines and improve efficiency for subsequent edits

Release notes draft

• As part of our ongoing content refresh for B2B Edition developer documentation, we've fully refreshed the Server-to-Server Quotes documentation. This includes
  • New, thorough descriptive copy
  • Inclusion of previously missing fields from several endpoints
  • Expansion of response error causes and resolutions

Anything else?

ping @bc-terra