feat(12.1-01): declared bulk actions on admin lists

- pact.HasAdminBulkActions with AdminBulkAction, its input and result
- config_list.yaml bulkActions, compiled fail-loud, needs showCheckboxes
- POST .../{controller}/bulk/{action}: ids resolved and locked through the
  list scope in one transaction; partial selection is 409
- list schema offers declared actions per principal, with confirm text
- admin SPA bulk actions menu with confirm, busy state and failure toasts
- acme.roster fixture, tracer test, OpenAPI, TS types, dist, READMEs, docs

modules/cabana/testdata/roster/lang/pl/lang.yaml

@@ -0,0 +1,10 @@
+people:
+  title: Osoby
+  form: Osoba
+  create: Nowa osoba
+  name: Imię i nazwisko
+  email: E-mail
+  activate: Aktywuj
+  activate_confirm: Aktywować zaznaczone osoby?
+  archive: Archiwizuj
+  archived: Zaznaczone osoby zostały zarchiwizowane.