Add Narwhals to package list (#5121)

Narwhals is a lightweight compatibility layer between dataframe libraries, with
zero dependencies. It's now used by Altair, so I'm opening this PR to enable
them to update their version here on Pyodide vega/altair#3642

docs/project/changelog.md

@@ -90,6 +90,7 @@ myst:
 - Added `tree-sitter-go` 0.23.1 {pr}`5102`
 - Added `tree-sitter-java` 0.23.2 {pr}`5102`
 - Added `tree-sitter-python` 0.23.2 {pr}`5102`
+- Added `Narwhals` 1.9.4 {pr}`5121`
 
 ## Version 0.26.3
 

packages/narwhals/meta.yaml

@@ -0,0 +1,16 @@
+package:
+  name: narwhals
+  version: 1.10.0
+  top-level:
+    - narwhals
+source:
+  url: https://files.pythonhosted.org/packages/82/45/6bb08a5e5ac2d9a95f4116567d0aafb1e5f86c4bbcf982e209e5ae872b3d/narwhals-1.10.0-py3-none-any.whl
+  sha256: c83a378960651c391e5f3d68af3a821eda74c9713073518fe0c39aefc5ad8f8e
+about:
+  home: https://github.com/narwhals-dev/narwhals
+  PyPI: https://pypi.org/project/narwhals
+  summary: Extremely lightweight compatibility layer between dataframe libraries
+  license: MIT
+extra:
+  recipe-maintainers:
+    - MarcoGorelli

packages/narwhals/test_narwhals.py

@@ -0,0 +1,21 @@
+from pytest_pyodide import run_in_pyodide
+
+
+@run_in_pyodide(packages=["narwhals"])
+def test_narwhals_from_native(selenium):
+    import narwhals as nw
+
+    class MyDictDataFrame:
+        def __init__(self, data):
+            self._data = data
+
+        def __narwhals_dataframe__(self):
+            return self
+
+        @property
+        def columns(self):
+            return list(self._data)
+
+    assert nw.from_native(
+        MyDictDataFrame({"a": [1, 2, 3], "b": [4, 5, 6]})
+    ).columns == ["a", "b"]