Add person endorse command

[KirillSergeevich]

What

• New command linkedin person endorse <url>. It takes exactly one of:
  • --skill <name>: endorse one skill, by its exact name;
  • --pattern <re>: repeatable; endorse every skill whose name matches any of the RE2 patterns;
  • --all: endorse every skill.
• Giving none of them, or more than one, is a usage error (exit 5) raised before any API call, so nothing gets endorsed by accident.
• Output:
  • with --pattern or --all, one line per selected skill, Endorsed: <skill> or Not endorsed: <skill> - <errorType>;
  • with --skill, the standard void output or error;
  • --json returns the standard envelope.
• stEndorsements is added to admin limits set and admin limits delete.
• The person topic description now mentions endorsing.
• @linkedapi/node ^2.3.19; version 1.2.22.

Checks

• npm run lint, npm run typecheck and npm run build pass.
• The command was run in a real pseudo-terminal and with --json, against a local HTTP stub:
  • all five invalid flag combinations exit 5 with zero requests;
  • --skill, repeated --pattern and --all post the expected workflow (--all sends no patterns);
  • the cases covered are success, mixed limitExceeded / endorsementUnavailable, skillNotFound and connectionNotFound;
  • admin limits set and delete send stEndorsements.

Release

Publish no later than linkedin-skills 1.0.17, which documents this command.