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

.claude/settings.json

@@ -0,0 +1,14 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(*)",
+      "Read(*)",
+      "Write(*)",
+      "Edit(*)",
+      "Glob(*)",
+      "Grep(*)",
+      "Task(*)",
+      "Bash(wsl bash -c \"source ~/miniconda3/etc/profile.d/conda.sh && conda activate invoice-py311 && cd /mnt/c/Users/yaoji/git/ColaCoder/invoice-master-poc-v2 && pytest tests/web/test_batch_upload_routes.py::TestBatchUploadRoutes::test_upload_batch_async_mode_default -v -s 2>&1 | head -100\")"
+    ]
+  }
+}