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.

main.py

@@ -1,56 +0,0 @@
-import subprocess
-import os
-import sys
-import time
-import webbrowser
-
-
-def install_missing_packages():
-    packages = ["uvicorn", "fastapi", "sentence-transformers"]
-    for package in packages:
-        try:
-            __import__(package.replace("-", "_"))
-        except ImportError:
-            print(f"[*] Instalowanie brakującej biblioteki: {package}...")
-            subprocess.check_call([sys.executable, "-m", "pip", "install", package])
-
-
-def run_archivium():
-    install_missing_packages()
-    base_dir = os.path.dirname(os.path.abspath(__file__))
-
-    backend_script = os.path.join(base_dir, "Database", "database.py")
-    frontend_dir = os.path.join(base_dir, "TextEditor")
-
-    print("\n--- URUCHAMIANIE SYSTEMU ARCHIVIUM ---")
-
-    print(f"[*] Startuję bazę danych...")
-    backend_process = subprocess.Popen(
-        [sys.executable, backend_script],
-        cwd=os.path.join(base_dir, "Database")
-    )
-
-    print(f"[*] Startuję edytor...")
-    frontend_process = subprocess.Popen(
-        "npm start",
-        shell=True,
-        cwd=frontend_dir,
-        creationflags=subprocess.CREATE_NEW_CONSOLE
-    )
-
-    print("[*] Oczekiwanie na gotowość...")
-    time.sleep(5)
-
-    webbrowser.open("http://localhost:3000")
-
-    try:
-        backend_process.wait()
-        frontend_process.wait()
-    except KeyboardInterrupt:
-        print("\n[*] Zamykanie systemu...")
-        backend_process.terminate()
-        frontend_process.terminate()
-
-
-if __name__ == "__main__":
-    run_archivium()