add openhands setup.sh (#31)

Author: xingyaoww

.openhands/setup.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+if ! command -v uv &> /dev/null; then
+    echo "uv is not installed. Installing..."
+    curl -LsSf https://astral.sh/uv/install.sh | sh
+else
+    echo "uv is already installed."
+    uv self update  # always update to the latest version
+fi
+
+make build