Support native Apple Silicon (M1/M2/M3/m4...) macOS version

Hi,

Recently macOS showed a warning that the Intel version of WindTerm may no longer be supported in future macOS releases.

Currently WindTerm on macOS still runs through Rosetta on Apple Silicon devices (M1/M2/M3).
I would like to ask whether there are plans to provide a native Apple Silicon (arm64) build for macOS.

A native version would help with:

* Better compatibility with future macOS versions
* Improved performance and lower power consumption
* Avoiding dependency on Rosetta 2

WindTerm is a great tool and many Apple Silicon users would really appreciate native support.

Thanks for your work!

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macOS Sequoia already warns users about Intel-only applications,
and future macOS versions may remove Rosetta support completely.

The issue does not name any files, tests, or build entry points. Start by locating the macOS packaging and build configuration, then determine how the current Intel artifact is produced and whether an arm64 target is supported. Done means a native Apple Silicon build is available and runs without Rosetta.

Written by the indexing model from the issue text.