Provide Windows error message

build.zig

@@ -3,6 +3,8 @@ const build_facilio = @import("facil.io/build.zig").build_facilio;
 
 pub fn build(b: *std.build.Builder) !void {
     const target = b.standardTargetOptions(.{});
+    if (target.getOsTag() == .windows)
+        @panic("\nCurrently, Facil.io and Zap are not compatible with Windows. Consider using Linux or Windows Subsystem for Linux (WSL) instead.\nFor more information, please see:\n- https://github.com/zigzap/zap#most-faq\n- https://facil.io/#forking-contributing-and-all-that-jazz\n");
     // Standard release options allow the person running `zig build` to select
     // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
     const optimize = b.standardOptimizeOption(.{});