refactor: extract command closures into named methods — agentic 61.4%
Move all command closure bodies from registerForgeCommands,
registerWorkspaceCommands into standalone methods (cmd*) on PrepSubsystem.
This makes them directly testable without CLI integration.
New: 9 forge command methods (cmdIssueGet, cmdIssueList, cmdIssueComment,
cmdIssueCreate, cmdPRGet, cmdPRList, cmdPRMerge, cmdRepoGet, cmdRepoList)
+ 3 workspace methods (cmdWorkspaceList, cmdWorkspaceClean, cmdWorkspaceDispatch)
Coverage: agentic 54.3% → 61.4% (+7.1pp)
Total: 501 agentic tests, 727 across all packages
Co-Authored-By: Virgil <virgil@lethean.io>
b5cb294b25