Use lazy imports in __init__.py (#3847)

skyvern/library/__init__.py

@@ -1,3 +1,14 @@
-from skyvern.library.skyvern import Skyvern
+from typing import Any
 
+# noinspection PyUnresolvedReferences
 __all__ = ["Skyvern"]
+
+
+def __getattr__(name: str) -> Any:
+    """Lazily import Skyvern."""
+    if name == "Skyvern":
+        from skyvern.library.skyvern import Skyvern  # noqa: PLC0415
+
+        globals()["Skyvern"] = Skyvern
+        return Skyvern
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")