docs: Modified and Updated README.md inside tutorials/space_shoot

[RutviShukla]

In this PR I worked mainly on modifying and adding more relevant information in the README.md inside tutorials/space_shooter. I created a youtube video as a visual aid for users on part 1 of the space shooter project whose link I added to the README.md inside tutorials/space_shooter. From the main README.md, I moved the information provided at the bottom on how to get started to the README.md inside tutorials/space_shoot. Lastly, On the main README.md I redirected users to the README.md inside tutorials/space_shoot when they click on "tutorials."