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/approvals.service.ts

@@ -0,0 +1,30 @@
+import { api } from "@/lib/api-client";
+import type { PaginatedResponse, PaginationParams, ApiSuccessResponse } from "@/types";
+
+export interface ApprovalWorkflow {
+  id: number;
+  name: string;
+  entity_id: number;
+  entity_name: string;
+  steps: { order: number; approver_id: number; approver_name: string }[];
+  status: "active" | "draft";
+  created_at: string;
+}
+
+export const approvalsService = {
+  async list(params?: PaginationParams): Promise<PaginatedResponse<ApprovalWorkflow>> {
+    return api.get<PaginatedResponse<ApprovalWorkflow>>("/approval-workflows", params as Record<string, string | number | boolean | undefined>);
+  },
+
+  async create(data: Partial<ApprovalWorkflow>): Promise<ApprovalWorkflow> {
+    return api.post<ApprovalWorkflow>("/approval-workflows", data);
+  },
+
+  async update(id: number, data: Partial<ApprovalWorkflow>): Promise<ApprovalWorkflow> {
+    return api.patch<ApprovalWorkflow>(`/approval-workflows/${id}`, data);
+  },
+
+  async delete(id: number): Promise<ApiSuccessResponse> {
+    return api.delete<ApiSuccessResponse>(`/approval-workflows/${id}`);
+  },
+};