Separate out langchain_core package (#13577)

Co-authored-by: Nuno Campos <nuno@boringbits.io>
Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: Erick Friis <erick@langchain.dev>

libs/core/langchain_core/env.py

@@ -0,0 +1,17 @@
+import platform
+from functools import lru_cache
+
+
+@lru_cache(maxsize=1)
+def get_runtime_environment() -> dict:
+    """Get information about the LangChain runtime environment."""
+    # Lazy import to avoid circular imports
+    from langchain_core import __version__
+
+    return {
+        "library_version": __version__,
+        "library": "langchain",
+        "platform": platform.platform(),
+        "runtime": "python",
+        "runtime_version": platform.python_version(),
+    }