Fix linting issues in __init__.py

- Move Agent import to the top of the file
- Sort __all__ list alphabetically
- Remove unused typing.Tuple import
- Format __all__ list for better readability

Co-authored-by: Jay Hack <jay@codegen.com>

Author: codegen-sh[bot]

src/codegen/__init__.py

@@ -1,12 +1,19 @@
 # file generated by setuptools-scm
 # don't change, don't track in version control
 
-__all__ = ["__version__", "__version_tuple__", "version", "version_tuple", "Agent"]
+# Import Agent class for top-level access
+from codegen.agents.agent import Agent
+
+__all__ = [
+    "Agent",
+    "__version__",
+    "__version_tuple__",
+    "version",
+    "version_tuple",
+]
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
-    from typing import Tuple
-
     VERSION_TUPLE = tuple[int | str, ...]
 else:
     VERSION_TUPLE = object
@@ -18,6 +25,3 @@
 
 __version__ = version = "0.55.8.dev50+gd8c9a1fa"
 __version_tuple__ = version_tuple = (0, 55, 8, "dev50", "gd8c9a1fa")
-
-# Import Agent class for top-level access
-from codegen.agents.agent import Agent