Add Bayes as submodule in showcase

Author: brandonkachen

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "showcase/game-of-life"]
 	path = showcase/game-of-life
 	url = https://github.com/narthur/game-of-life
+[submodule "showcase/bayes"]
+	path = showcase/bayes
+	url = https://github.com/narthur/bayes

showcase/README.md

@@ -5,6 +5,7 @@ Community showcase of projects built by Codebuff
 
 - [Later](https://github.com/narthur/later) - A task management app inspired by Do It (Tomorrow), built with Svelte
 - [Game of Life](https://github.com/narthur/game-of-life) - Conway's Game of Life implementation with TypeScript
+- [Bayes](https://github.com/narthur/bayes) - A web application for applying Bayesian reasoning to everyday life
 
 ## Cloning