livechat: scaffold adapter (LiveChatWidget.call + .on)

[productdevbook]

Add `ahize/livechat` adapter. Wraps LiveChat (text.com) widget — the best-documented, best-typed competitor reference.

Reference

• Official: `@livechat/widget-react` / `widget-vue` / `widget-angular` / `widget-core` https://github.com/livechat/chat-widget-adapters
• API: https://platform.text.com/docs/extending-chat-widget/javascript-api
• Key issues to avoid:
  • `#101` SSR Problem with React implementation/SSR livechat/chat-widget-adapters#101
  • `jivochat: audit vs current vendor docs (2026-04-16) #87` minimized-while-offline hides widget Minimised hides the vue chat widget, if the support is offline. livechat/chat-widget-adapters#87
  • `infra: release automation (bumpp + changelogithub + npm provenance) #77` programmatic chat start Programmatically start chat livechat/chat-widget-adapters#77
  • `#111` Angular standalone Angular Adaptor: widget components must explicitly state standalone: false when declared in an NgModule livechat/chat-widget-adapters#111

Tasks

• `load({ license })` — injects script with `window.__lc`
• `identify({ email, name })` → `LiveChatWidget.call('set_customer_email'|'set_customer_name', ...)`
• `track(event, meta)` → `LiveChatWidget.call('update_session_variables', {[event]: meta})`
• `show()/hide()` → `LiveChatWidget.call('maximize'|'hide')`
• `shutdown()` → `LiveChatWidget.call('destroy')`
• `onReady`, `onVisibilityChanged`, `onNewEvent`, `onCustomerStatusChanged` passthroughs