HH-530: replace user-facing Chatwoot branding with GoChat (#117)

* fix(HH-530): replace user-facing Chatwoot branding

* fix(HH-530): close branding review blockers

* test(HH-530): cover update banner binding

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Co-authored-by: Rogee <rogee@ipao.vip>

frontend/app/javascript/widget/i18n/locale/en.json

@@ -57,7 +57,7 @@
   "BUBBLE": {
     "LABEL": "Chat with us"
   },
-  "POWERED_BY": "Powered by Chatwoot",
+  "POWERED_BY": "Powered by GoChat",
   "EMAIL_PLACEHOLDER": "Please enter your email",
   "CHAT_PLACEHOLDER": "Type your message",
   "TODAY": "Today",

frontend/app/javascript/widget/i18n/locale/zh_CN.json

@@ -57,7 +57,7 @@
   "BUBBLE": {
     "LABEL": "联系我们"
   },
-  "POWERED_BY": "由 Chatwoot 支持",
+  "POWERED_BY": "由 GoChat 支持",
   "EMAIL_PLACEHOLDER": "请输入您的电子邮件",
   "CHAT_PLACEHOLDER": "输入您的消息",
   "TODAY": "今天",