Log in to Tool Repository on crewai login (#1650)

This commit adds an extra step to `crewai login` to ensure users also
log in to Tool Repository, that is, exchanging their Auth0 tokens for a
Tool Repository username and password to be used by UV downloads and API
tool uploads.

src/crewai/cli/authentication/token.py

@@ -0,0 +1,10 @@
+from .utils import TokenManager
+
+def get_auth_token() -> str:
+    """Get the authentication token."""
+    access_token = TokenManager().get_token()
+    if not access_token:
+        raise Exception()
+    return access_token
+
+