Add A New Slide

## We Need More Slides
Grab another octocat and create a new slide from scratch.
If you need help, check out the Appendix in the training manual.

Read the Appendix in the training manual first, then inspect the repository to find how its existing slides are organized. Create one additional slide from scratch featuring another octocat; done means the new slide is present and follows the project's existing slide structure.

索引モデルが issue の本文から書いたものです。