docs: add QA checks overview screenshot to translation editor docs

Author: Anty0

platform/translation_process/qa_checks.mdx

@@ -13,7 +13,10 @@ When managing translations across many languages, it's easy for localization err
 
 QA Checks solve this by automatically validating your translations and flagging potential issues such as missing placeholders, broken placeholder syntax, inconsistent punctuation, spelling and grammar errors, and more. Issues are detected **in real time** as you type and also run in the background when translations are saved or modified in bulk.
 
-{/* TODO: Screenshot - overview of QA checks panel in the translation editor showing a few issues */}
+<ScreenshotWrapper
+  src="/img/docs/platform/qa-checks/qa_checks_overview.png"
+  alt="Overview of QA checks panel in the translation editor showing detected issues"
+/>
 
 :::info Feature availability
 QA Checks are available in advanced plans. [Upgrade your plan](https://tolgee.io/pricing) to use this feature.