Automatically detect IPV6 to automatically switch on and off IPV6 filtering

### Issue Details

In an IPV4 Only environment, some APPs cannot be opened after dual-stack DNS resolution. The reason is that they prioritize V6 access, but cannot be accessed because the network does not have an IPV6 address (cannot fall back to IPV4 result).

### Proposed solution

Through the detection method, if it is detected that an existing connection (such as WiFi) only has an IPV4 address and the IPV6 address starts with fe80::, filtering of the IPV6 network will be automatically disabled and AAAA records will no longer be parsed. This function is automatically restored if there is an available IPV6 address (such as NAT6, 2000::/8).

### Alternative solution

_No response_