chore: establish Ekklesia platform foundation

tests/fixtures/boundaries/module-imports-surface/modules/calendar/src/index.ts

@@ -0,0 +1,3 @@
+import { CalendarView } from "../../../surfaces/dashboard/src/calendar-view.js";
+
+export const invalidModuleUi = CalendarView;

tests/fixtures/boundaries/module-imports-surface/surfaces/dashboard/src/calendar-view.ts

@@ -0,0 +1 @@
+export const CalendarView = "calendar-view";