Add uv.lock to file associations (microsoft#23991)

> `uv.lock` is a human-readable TOML file

https://docs.astral.sh/uv/concepts/projects/#lockfile

Author: edgarrmondragon

package.json

@@ -1234,7 +1234,8 @@
             {
                 "filenames": [
                     "Pipfile",
-                    "poetry.lock"
+                    "poetry.lock",
+                    "uv.lock"
                 ],
                 "id": "toml"
             },