docs(context-drawer): add comment about internal ButtonCorner component and fix lint

Author: stephl3

packages/context-drawer/src/ButtonCorner/ButtonCorner.tsx

@@ -5,6 +5,11 @@ import { useDarkMode } from '@leafygreen-ui/leafygreen-provider';
 import { getFill, getWrapperStyles } from './ButtonCorner.styles';
 import { Side } from './ButtonCorner.types';
 
+/**
+ * @returns component that renders the visually rounded sides of the ContextDrawerButton.
+ *
+ * @internal
+ */
 export const ButtonCorner = ({ side }: { side: Side }) => {
   const { theme } = useDarkMode();
 

packages/context-drawer/src/index.ts

@@ -1 +1,4 @@
-export { ContextDrawerButton, type ContextDrawerButtonProps } from './ContextDrawerButton';
+export {
+  ContextDrawerButton,
+  type ContextDrawerButtonProps,
+} from './ContextDrawerButton';