docs: add eslint config (#41)

Otherwise there are errors about missing `>` when opening a composition file.

packages/kitbook/src/docs/4-component-compositions.md

@@ -27,6 +27,22 @@ And add this VSCode setting:
 }
 ```
 
+And if you are using eslint:
+
+```js twoslash title=".eslintrc.cjs" {6}
+module.exports = {
+  overrides: [
+    {
+      files: [
+        '*.svelte',
+        '*.composition'
+      ]
+      // ...
+    }
+  ]
+}
+```
+
 You can also create a Composition beside a corresponding markdown documentation page as you see in [[complex-examples]] (look at the source code) - just click the `Add Composition` button when viewing your markdown page.
 
 Now that you have a composition in place, learn how to [[5-write-documentation|document your components]], including sprinkling in compositions where helpful.
@@ -36,4 +52,4 @@ Now that you have a composition in place, learn how to [[5-write-documentation|d
 [SearchResult]: ../lib/layout/sidebar/search/SearchResult.md "SearchResult"
 [complex-examples]: 2-compositions/complex-examples.md "Advanced Composition Use Cases"
 [5-write-documentation|document your components]: 5-write-documentation.md "Write Documentation"
-[//end]: # "Autogenerated link references"
+[//end]: # "Autogenerated link references"