azure-dynamic-sessions: add Python REPL tool (#21264)

Adds a Python REPL that executes code in a code interpreter session
using Azure Container Apps dynamic sessions.

---------

Co-authored-by: Erick Friis <erick@langchain.dev>

libs/partners/azure-dynamic-sessions/scripts/check_imports.py

@@ -0,0 +1,17 @@
+import sys
+import traceback
+from importlib.machinery import SourceFileLoader
+
+if __name__ == "__main__":
+    files = sys.argv[1:]
+    has_failure = False
+    for file in files:
+        try:
+            SourceFileLoader("x", file).load_module()
+        except Exception:
+            has_faillure = True
+            print(file)
+            traceback.print_exc()
+            print()
+
+    sys.exit(1 if has_failure else 0)