feat: Add support for dark mode in dashboard (#7460)

- Add config for TailwindCSS
- Enable HMR
- Add a config in LocalStorage for Dark Mode

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

config/webpacker.yml

@@ -62,7 +62,7 @@ development:
     host: 0.0.0.0
     port: 3035
     public: 0.0.0.0:3035
-    hmr: false
+    hmr: true
     # Inline should be set to true if using HMR
     inline: true
     overlay: true