Monorepo Integration: Unified Backend, Frontend & Documentation

- Reorganize project into monorepo structure
  - backend/app/ - New FastAPI backend (modular with src/)
  - backend/legacy/ - Legacy database modules (relational & vector)
  - frontend/ - React text editor application

- Add launcher.py for easy full-stack startup
- Complete documentation in README.md
  - Quick start guide
  - API endpoints reference
  - Development setup
  - Troubleshooting

- Refactor main.py to 35 lines (app configuration only)
- Update .gitignore for full-stack project
- Add CHANGELOG.md with version history (v0.1.0-v0.1.1)

Structure is now clean and ready for team collaboration.

launcher.py

@@ -0,0 +1,83 @@
+"""Archivium Launcher - Uruchamia całą aplikację"""
+import subprocess
+import os
+import sys
+import time
+import webbrowser
+
+
+def install_missing_packages():
+    """Instaluj brakujące pakiety"""
+    packages = ["uvicorn", "fastapi", "sqlalchemy", "passlib[argon2]"]
+    for package in packages:
+        try:
+            __import__(package.split("[")[0].replace("-", "_"))
+        except ImportError:
+            print(f"[*] Instalowanie: {package}...")
+            subprocess.check_call([sys.executable, "-m", "pip", "install", package])
+
+
+def run_archivium():
+    """Uruchom całą aplikację Archivium"""
+    install_missing_packages()
+    
+    base_dir = os.path.dirname(os.path.abspath(__file__))
+    backend_dir = os.path.join(base_dir, "backend", "app")
+    frontend_dir = os.path.join(base_dir, "frontend")
+
+    print("\n" + "="*50)
+    print("   ARCHIVIUM - System Zarządzania Archiwum")
+    print("="*50 + "\n")
+
+    print("[1/3] Startuje backend (Port 8000)...")
+    backend_process = subprocess.Popen(
+        [sys.executable, "main.py"],
+        cwd=backend_dir
+    )
+
+    print("[2/3] Startuje frontend (Port 3000)...")
+    try:
+        frontend_process = subprocess.Popen(
+            "npm start",
+            shell=True,
+            cwd=frontend_dir,
+        )
+    except Exception as e:
+        print(f"[!] Uwaga: Nie udało się uruchomić frontendu: {e}")
+        print("[*] Frontend może wymagać: npm install && npm start")
+        frontend_process = None
+
+    print("[3/3] Otwieranie przeglądarki...")
+    time.sleep(3)
+    
+    try:
+        webbrowser.open("http://localhost:3000")
+    except Exception as e:
+        print(f"[!] Nie udało się otworzyć przeglądarki: {e}")
+        print("[*] Otwórz ręcznie: http://localhost:3000")
+
+    print("\n" + "="*50)
+    print("✓ Aplikacja uruchomiona!")
+    print("  Backend:  http://localhost:8000")
+    print("  Frontend: http://localhost:3000")
+    print("  Docs:     http://localhost:8000/docs")
+    print("="*50)
+    print("\nAby zatrzymać: Ctrl+C\n")
+
+    try:
+        backend_process.wait()
+        if frontend_process:
+            frontend_process.wait()
+    except KeyboardInterrupt:
+        print("\n[*] Zatrzymywanie systemu...")
+        backend_process.terminate()
+        if frontend_process:
+            frontend_process.terminate()
+        backend_process.wait()
+        if frontend_process:
+            frontend_process.wait()
+        print("[✓] System zatrzymany")
+
+
+if __name__ == "__main__":
+    run_archivium()