feat: initial project setup

- Add .NET 8 backend with Clean Architecture
- Add React + Vite + TypeScript frontend
- Implement authentication with JWT
- Implement Azure Blob Storage client
- Implement OCR integration
- Implement supplier matching service
- Implement voucher generation
- Implement Fortnox provider
- Add unit and integration tests
- Add Docker Compose configuration

frontend/README.md

@@ -0,0 +1,37 @@
+# Invoice Master - Frontend
+
+React + TypeScript + Vite frontend for Invoice Master.
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js 18+
+- npm or yarn
+
+### Installation
+
+```bash
+npm install
+```
+
+### Development
+
+```bash
+npm run dev
+```
+
+### Build
+
+```bash
+npm run build
+```
+
+### Environment Variables
+
+Copy `.env.example` to `.env.local` and configure:
+
+```
+VITE_API_URL=http://localhost:5000/api/v1
+VITE_APP_NAME="Invoice Master"
+```