wip: replace packages with pure files

packages/constants/session.ts

@@ -0,0 +1,15 @@
+export interface SessionSummaryResponse {
+  _id: string
+  user: string
+  quest: string
+  status: string
+  createdAt: Date
+  lastActivityAt: Date
+}
+
+export interface SessionDetailResponse extends SessionSummaryResponse {
+  hints: string[][]
+  tasks: string[][]
+  responses: string[][]
+  graph: any
+}