Add Git push smoke test

README.md

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+# Git Push Smoke Test
+
+This repository verifies that the OpenClaw agent can create a local Git
+repository and push commits to the configured Gitea server.
+
+Run:
+
+```sh
+./hello.sh
+```

hello.sh

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+#!/bin/sh
+
+set -eu
+
+echo "Git push test succeeded."