Add some events to landing screen (#4664)

src/lib/statsig/events.ts

@@ -188,6 +188,12 @@ export type LogEvents = {
     profilesCount: number
     feedsCount: number
   }
+  'starterPack:ctaPress': {
+    starterPack: string
+  }
+  'starterPack:opened': {
+    starterPack: string
+  }
 
   'test:all:always': {}
   'test:all:sometimes': {}