docs(faq): using shorebird for all dart changes (#176)

docs/faq.md

@@ -111,6 +111,18 @@ Also Shorebird does not support changing native code (e.g. Java/Kotlin on
 Android or Objective-C/Swift on iOS). The tool will warn you during an
 attempted patch if you have changed native code.
 
+### Can I use Shorebird for all my Dart changes?
+
+Shorebird can be used to update any Dart code including pure Dart packages.
+Note that depending on how you distribute your apps, some store agreements
+expect feature changes to go through store review.
+Notably Apple's App Store requires that an update "does not change the
+primary purpose of the Application by providing features or functionality
+that are inconsistent with the intended and advertised purpose of the Application."
+Also note that patch sizes correlate with the total amount of Dart changed from
+the original released app. Each patch is a diff against the released dart code,
+not a diff to the previous patch.
+
 ### Does Shorebird submit to the stores for me?
 
 Shorebird does not currently support submitting to the app stores on your