Update version to 2026.2.13 in manifest.json

优化配置流程、兼容ikuai4.0测试版

Merge pull request #26 from wyh7ng/patch-1

感谢
修复all_lan_devices获取，确实是上次增加wan_ipv6时数组位遗漏了修改.

Add advanced guide for custom iKuai switch entities

Add new configuration constants for IKUAI

Refactor constants for ikuai integration

Updated constants and added new configuration options for the ikuai integration.

Change should_poll to return True

Update README for device_tracker configuration location

Update manifest.json

Update README.md