Removed unnecessary conditional check for wantStdout in Test_createRun. Now always asserts equality between wantStdout and actual stdout output, improving test clarity.
Normalizes job API error messages to include status code and text, ensures errors from job polling are surfaced to stderr without halting execution, and updates tests to verify error output and remove outdated fallback behavior.
Introduces the 'create' subcommand for agent tasks, allowing users to create agent jobs via the Copilot API. Adds job API client methods, job model, and polling logic to retrieve associated pull requests. Includes tests for various job creation scenarios.
