[Feature] Email collect message hooks (#331)

- Add email collect hook on creating conversation
- Merge contact if it already exist

app/javascript/widget/assets/scss/woot.scss

@@ -4,6 +4,8 @@
 @import 'mixins';
 @import 'forms';
 @import 'shared/assets/fonts/inter';
+@import '~ionicons/scss/ionicons';
+@import '~spinkit/scss/spinners/7-three-bounce';
 
 html,
 body {