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.

Inspect the repository’s existing slides to find the appropriate place and structure for a new one, then consult the Appendix in the training manual if needed. Add another octocat slide from scratch; done means the new slide is present and matches the project’s existing slide format.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.