Explain groot the behavior tree editor installation

Code sourcing

installer.sh

#!/bin/bash
set -e
ROS_DISTRO=foxy 
STEP=0

STEP=$((STEP+1))
echo step $STEP
sudo apt-get -y install qtbase5-dev qtbase5-dev libqt5svg5-dev
sudo apt-get install ros-$ROS_DISTRO-behaviortree-cpp-v3

STEP=$((STEP+1))
echo step $STEP
git clone https://github.com/BehaviorTree/Groot.git 

STEP=$((STEP+1))
echo step $STEP
cd Groot

STEP=$((STEP+1))
echo step $STEP
git submodule update --init --recursive
echo Fin

Build

Move the Groot directory to ros workspace, and

colcon build --pakcages-up-to groot