verify tvm-ffi cpp wrapper on vector-add.py

Signed-off-by: jinjieliu <jinjie.liu@usc.edu>

.gitignore

@@ -0,0 +1,16 @@
+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv
+
+.vscode/
+
+.clangd
+.python-version
+uv.lock