Add persistent history stacks

src/domain/ports/project-history.store.ts

@@ -0,0 +1,12 @@
+export interface ProjectHistoryState {
+  projectId: string;
+  currentRevision: number;
+  undoDepth: number;
+  redoDepth: number;
+  undoChangeSetId: string | null;
+  redoChangeSetId: string | null;
+}
+
+export interface ProjectHistoryStore {
+  getState(projectId: string): ProjectHistoryState | null;
+}