feat: use realworld like data

app/javascript/dashboard/components-next/message/constants.js

@@ -0,0 +1,26 @@
+export const MESSAGE_TYPES = {
+  INCOMING: 0,
+  OUTGOING: 1,
+  ACTIVITY: 2,
+  TEMPLATE: 3,
+};
+
+export const MESSAGE_VARIANTS = {
+  USER: 'user',
+  AGENT: 'agent',
+  ACTIVITY: 'activity',
+  PRIVATE: 'private',
+  BOT: 'bot',
+  TEMPLATE: 'template',
+};
+
+export const SENDER_TYPES = {
+  CONTACT: 'Contact',
+  USER: 'User',
+};
+
+export const ORIENTATION = {
+  LEFT: 'left',
+  RIGHT: 'right',
+  CENTER: 'center',
+};