Remove embedded demos

examples/entry_management_demo.py

@@ -0,0 +1,27 @@
+from pathlib import Path
+from cryptography.fernet import Fernet
+
+from password_manager.encryption import EncryptionManager
+from password_manager.vault import Vault
+from password_manager.entry_management import EntryManager
+
+
+def main() -> None:
+    """Demonstrate basic EntryManager usage."""
+    key = Fernet.generate_key()
+    enc = EncryptionManager(key, Path("."))
+    vault = Vault(enc, Path("."))
+    manager = EntryManager(vault, Path("."))
+
+    index = manager.add_entry(
+        "Example Website",
+        16,
+        username="user123",
+        url="https://example.com",
+    )
+    print(manager.retrieve_entry(index))
+    manager.list_all_entries()
+
+
+if __name__ == "__main__":
+    main()