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/widget/components/ChatAttachment.vue

@@ -147,7 +147,7 @@ export default {
     }"
     @input-file="onFileUpload"
   >
-    <button class="icon-button flex items-center justify-center">
+    <button class="min-h-8 min-w-8 flex items-center justify-center">
       <FluentIcon v-if="!isUploading.image" icon="attach" />
       <Spinner v-if="isUploading" size="small" />
     </button>