feat(apple): Add FAQ to app hang rate (#15111)

Add three FAQs to the app hang rate.

Author: philipphofmann

docs/platforms/apple/common/configuration/app-hangs.mdx

@@ -229,3 +229,17 @@ The App Hang Rate card displays the percentage of users affected by fatal app ha
 ![App Hang Rate](./img/app-hang-rate.png)
 
 Since App Hang Rate only includes fatal app hangs, it represents the most severe hangs that directly affect user retention and app store ratings.
+
+#### FAQ
+
+**Do the Crash Free Sessions and Crash Free Users include app hangs?**
+
+No, the Crash Free Sessions and Crash Free Users don't include app hangs.
+
+**Does the App Hang Rate include non-fatal app hangs?**
+
+No, the App Hang Rate doesn't include non-fatal app hangs.
+
+**Why does the App Hang Rate only include fatal app hangs?**
+
+The App Hang Rate only includes fatal app hangs, because they are the most critical type of app hang and directly impact user experience. However, we consider including non-fatal app hangs into the App Hang Rate as well; please upvote [this issue](https://github.com/getsentry/sentry-cocoa/issues/6325) to help us prioritize.