[🐴] Add new chat metrics (#4130)

* remove a comment

* add types for event, add log to profile button

* add `chat:open`

* add to chat list items

* fix types

* oops

* oops 2.0

src/lib/statsig/events.ts

@@ -125,6 +125,13 @@ export type LogEvents = {
       | 'ProfileHeaderSuggestedFollows'
       | 'ProfileMenu'
       | 'ProfileHoverCard'
+      | 'Chat'
+  }
+  'chat:create': {
+    logContext: 'ProfileHeader' | 'NewChatDialog'
+  }
+  'chat:open': {
+    logContext: 'ProfileHeader' | 'NewChatDialog' | 'ChatsList'
   }
 
   'test:all:always': {}