(User experience) Specify to git clone jarvis-cd as well

[manikantateja973]

Hello, it would be an improvement to the ease of use of this tutorial, if it's mentioned to git clone "jarvis-cd" before changing the path to jarvis-cd under the section 0.2. Installation in the README.md file.

Current:

cd /path/to/jarvis-cd
python3 -m pip install -r requirements.txt
python3 -m pip install -e .

Suggested change:

git clone https://github.com/grc-iit/jarvis-cd.git
cd /path/to/jarvis-cd
python3 -m pip install -r requirements.txt
python3 -m pip install -e .