alexion
965ece306f
Add the PR-side state mutations mirroring the issue-side slice: - `pr edit` applies title/body/base/milestone and the recomputed assignee list in one PATCH, with additive label endpoints and (per the ADR 0007 amendment) the dedicated requested-reviewers POST/DELETE endpoints for `--add-reviewer`/`--remove-reviewer`. - `pr close --comment` posts the comment after the PATCH and surfaces a comment-post failure; an already-closed or merged PR is an `already: true` no-op reporting the actual state. - `pr reopen` is an `already: true` no-op when already open. Extract the fetch-then-patch assignee merge into a shared `src/assignees.ts` (`mergeAssignees` + `assigneeLogins`), now used by both `issue edit` and `pr edit`.