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/ChatSendButton.vue

@@ -28,7 +28,7 @@ export default {
   <button
     type="submit"
     :disabled="disabled"
-    class="icon-button flex items-center justify-center ml-1"
+    class="min-h-8 min-w-8 flex items-center justify-center ml-1"
   >
     <FluentIcon v-if="!loading" icon="send" :style="`color: ${color}`" />
     <Spinner v-else size="small" />