[codex] Support localized trigger buttons

[devashishmamgain]

Jira

• TDH-3904

Summary

• Extend startup trigger buttons (kommunicateSettings.quickReplies) to support rich quick-reply-style objects in addition to the existing string array.
• Render localized button text from title/name, send the configured message, preserve optional replyMetadata, and apply updateLanguage/languageCode when the visitor clicks the trigger button.
• Keep existing string trigger buttons on the same text-box submit path for backward compatibility.

Root Cause

Trigger buttons are configured through the same quickReplies setting documented for the web widget, but the startup renderer treated every item as a plain string and sent innerText through the text box. That meant trigger buttons could not use the localized display text, reply metadata, or language update fields already supported by rich-message quick replies.

Validation

• git diff --check
• Not run: node --check webplugin/js/app/kommunicate-ui.js because Node is not installed in this environment (zsh: command not found: node).