TW-4937: surface API request ID in CLI error output

[qasim-nylas]

Summary

• Extract request_id from Nylas API error responses (JSON body with header fallback) and propagate through APIError → CLIError → FormatError
• Display request ID on a dedicated line in CLI error output, giving users an actionable reference for debugging with the platform team
• Strip inline [request_id: ...] from the error message in FormatError path to avoid duplication while preserving it in Error() for logging contexts

Related docs

Commands affected by improved error output:

• email list · email send · email search
• calendar events list · calendar events create
• contacts list · contacts search
• webhook list · webhook create

Commands referenced in error suggestions:

• auth config · auth login · auth list
• auth show · auth switch · auth status

Test plan

• make ci passes
• NYLAS_API_KEY=bogus ./bin/nylas email list fake-grant-id shows Request ID: on its own line, not duplicated in the message
• Errors without a request ID (e.g. local validation like nylas email list with no API key) show no Request ID: line
• Unit tests cover: body extraction, header fallback, request ID propagation through WrapError, FormatError rendering, blank request ID omission, inline suffix stripping

[AaronDDM]

LGTM 👍