feat: Add RTL Support to Widget (#11022)

This PR adds RTL support to the web widget for improved right-to-left language compatibility, updates colors, and cleans up code.

Fixes https://linear.app/chatwoot/issue/CW-4089/rtl-issues-on-widget

https://github.com/chatwoot/chatwoot/issues/9791

Other PR: https://github.com/chatwoot/chatwoot/pull/11016

app/javascript/portal/application.scss

@@ -3,10 +3,6 @@
 @import 'tailwindcss/utilities';
 
 @import 'widget/assets/scss/reset';
-@import 'widget/assets/scss/variables';
-@import 'widget/assets/scss/buttons';
-@import 'widget/assets/scss/mixins';
-@import 'widget/assets/scss/forms';
 @import 'shared/assets/fonts/InterDisplay/inter-display';
 
 html,
@@ -18,7 +14,6 @@ body {
   letter-spacing: 0.2px;
 }
 
-
 // Taking these utils from tailwind 3.x.x, need to remove once we upgrade
 .scroll-mt-24 {
   scroll-margin-top: 6rem;