bd9fad68a7
- Changed `userToken` property to `getUserToken` function in KefuWidgetHostConfig for dynamic token fetching. - Introduced KefuWidgetRuntimeConfig to manage runtime-specific configurations. - Updated readKefuWidgetConfig and setKefuWidgetConfig functions to accommodate new configuration structure. - Enhanced cs-ai-agent-sdk.js to handle user token resolution and frame configuration. - Added tests for dynamic user token retrieval in cs-ai-agent-sdk.test.mjs. - Removed deprecated cs-agent-widget.js file as part of the refactor.