docs: add JSDoc to OnboardingBadgeProps

Author: BartekObudzinski

src/components/LHNOptionsList/OptionRowLHN/OptionRow/OnboardingBadge.tsx

@@ -8,6 +8,7 @@ import FreeTrial from '@pages/settings/Subscription/FreeTrial';
 import ONYXKEYS from '@src/ONYXKEYS';
 
 type OnboardingBadgeProps = {
+    /** The option data for the report row this badge belongs to. Used to determine whether the report is the onboarding chat. */
     optionItem: OptionData;
 };