add setup_colab.sh for Colab configuration

setup_colab.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# Exit script on any error
+set -e
+
+# Clone the repository
+if [ ! -d "point_utils" ]; then
+  git clone https://github.com/RenkeHuang/point_utils.git
+fi
+
+# Navigate to the repository directory
+cd point_utils
+
+# Install the package
+pip install .