⬆️(frontend) upgrade frontend to ESLint 9

Manually upgrade the frontend codebase to ESLint 9.

Update the linting configuration and related code where required to
maintain compatibility with the new major version.

src/frontend/src/features/pip/components/controls/PipOptionsMenu.tsx

@@ -116,7 +116,7 @@ export const PipOptionsMenu = ({ overflowControls }: PipOptionsMenuProps) => {
             zIndex: 10,
           })}
         >
-          {/* eslint-disable-next-line jsx-a11y/no-autofocus */}
+          {/* eslint-disable-next-line jsx-a11y/no-autofocus*/}
           <FocusScope autoFocus>
             <Box size="sm" type="popover" variant="dark">
               <PipOptionsMenuItems overflowControls={overflowControls} />