feat(vcs): PyCharm-style Commit view and one shared message dialog

- workbench/messages: one promise-based ask/confirm/confirmChecked/showError
  host replaces the per-feature confirm dialogs (app, services, vcs,
  project tree, keymap, run, database, find, LSP choice popup).
- Commit tool window: Commit | Shelf | Stash tabs as the title, IDEA's
  toolbar (Update Project, View Options, Select Opened File), Unversioned
  collapsed, Commit / Commit and Push on one row, empty-message error.
- Commit Options popup: author, sign-off, before-commit checks, Git hooks;
  vcs_commit takes CommitOptions (--author, --no-verify).
- Remove from Recent Projects asks first; refused history rewrites show an
  error dialog.

Claude-Session: https://claude.ai/code/session_01B65qLEKnkeYTGdbwhLpjCu

src/features/vcs/commitStore.ts

@@ -8,6 +8,10 @@ interface CommitState {
   message: string;
   amend: boolean;
   signOff: boolean;
+  /** Commit Options › Author (`Name <mail>`); blank uses the configured user. */
+  author: string;
+  /** Commit Options › Run Git hooks. */
+  runHooks: boolean;
   groupByDir: boolean;
   /** User overrides of the inclusion checkboxes (absolute path → state). */
   checks: Map<string, CheckState>;
@@ -28,6 +32,8 @@ export const useCommit = create<CommitState>(() => ({
   message: "",
   amend: false,
   signOff: false,
+  author: "",
+  runHooks: true,
   groupByDir: readBool("openidea.vcs.groupByDir", false),
   checks: new Map(),
   selection: [],