[FR] Add Windows Arm64 support

### Feature proposal

* Firebase Component: All

The FlutterFire package [downloads a pre-built library](https://github.com/firebase/flutterfire/blob/a48a707061e234a18bcef663d78c4a899caadf75/packages/firebase_core/firebase_core/windows/CMakeLists.txt#L28C27-L28C118). Currently it assumes an x64 architecture and fails on Windows Arm64 machine.

Ideally the Firebase C++ SDK would also publish a Windows Arm64 library. This would enable the FlutterFire package to choose the correct library based off the target architecture.

从引用的 packages/firebase_core/firebase_core/windows/CMakeLists.txt 开始，检查它如何下载预构建的 Windows 库。然后查看 Firebase C++ SDK 的发布产物和架构支持情况；当 Windows Arm64 库可用，并且 FlutterFire 能够为 Arm64 目标选择该库时，即表示完成。

由索引模型根据 Issue 内容生成。