- refactor(templates): update sidebar display conditionals for consistency

- Modified multiple template files to change the sidebar length conditionals from `!== 0` to `> 0` for improved readability and consistency across components.

- Added Code of Conduct

apps/artboard/src/templates/pikachu.tsx

@@ -609,7 +609,7 @@ export const Pikachu = ({ columns, isFirstPage = false }: TemplateProps) => {
         ))}
       </div>
 
-      <div className={cn("main group space-y-4", sidebar.length !== 0 ? "col-span-2" : "col-span-3")}>
+      <div className={cn("main group space-y-4", sidebar.length > 0 ? "col-span-2" : "col-span-3")}>
         {isFirstPage && <Header />}
 
         {main.map((section) => (