Custom shape examples (#2994)

This PR:
- adds a simple custom shape example
- adds an interactive shape example
- updates editable shape example

closes TLD-2118

- [x] `documentation` — Changes to the documentation only[^2]

### Release Notes

- adds a simple custom shape example
- adds an interactive shape example
- updates editable shape example

---------

Co-authored-by: Steve Ruiz <steveruizok@gmail.com>

apps/docs/tsconfig.json

@@ -24,5 +24,5 @@
 		".next/types/**/*.ts",
 		"watcher.ts"
 	],
-	"exclude": ["node_modules"]
+	"exclude": ["node_modules", ".next"]
 }