feat: add security module

src/fastapi_toolsets/security/__init__.py

@@ -0,0 +1,15 @@
+"""Authentication helpers for FastAPI using Security()."""
+
+from .abc import AuthSource
+from .oauth import decode_oauth_state, encode_oauth_state
+from .sources import APIKeyHeaderAuth, BearerTokenAuth, CookieAuth, MultiAuth
+
+__all__ = [
+    "APIKeyHeaderAuth",
+    "AuthSource",
+    "BearerTokenAuth",
+    "CookieAuth",
+    "MultiAuth",
+    "decode_oauth_state",
+    "encode_oauth_state",
+]