feat(v3): restructure project + add complete frontend

- Restructure: move backend from new_project/ to backend/
- Add full React/TypeScript frontend (37 pages, 17 services, 16 type defs, 11 query hooks)
- Add docs/ with SRS specs, user stories, and workflow documentation
- Update .gitignore for new directory layout

Workflows implemented:
  WF1 User Signup, WF2 Placement Test, WF3 Exam Configuration,
  WF4 General English Exam, WF5 Course Generation,
  WF6 Entity Student Onboarding, AI Course Generation,
  Adaptive Learning Engine UI, White-Label Branding, Score Release

Made-with: Cursor

frontend/src/services/student-progress.service.ts

@@ -0,0 +1,9 @@
+import { api } from "@/lib/api-client";
+import type { StudentProgression } from "@/types/student-progress";
+import type { PaginatedResponse, PaginationParams } from "@/types";
+
+export const studentProgressService = {
+  async listProgress(params?: PaginationParams): Promise<PaginatedResponse<StudentProgression>> {
+    return api.get<PaginatedResponse<StudentProgression>>("/student-progress", params as Record<string, string | number | boolean | undefined>);
+  },
+};