chore: explicitly link SDL2

TODO: What happens on Windows? macOS?

build.zig

@@ -105,6 +105,23 @@ pub fn package(
             zgui_c_cpp.linkSystemLibraryName("dwmapi");
         },
         .sdl2_opengl3 => {
+            // if (target.isWindows()) blk: {
+            //     // see: https://github.com/MasterQ32/SDL.zig/blob/37f4ba9e31bea895fa19ef8b90d1f51111e52e67/Sdk.zig#L182-L199
+
+            //     zgui_c_cpp.addVcpkgPaths(if (args.options.shared) .dynamic else .static) catch break :blk;
+            //     const path = zgui_c_cpp.vcpkg_bin_path orelse break :blk;
+
+            //     const src_path = std.fs.path.join(b.allocator, &.{ path, "SDL2.dll" }) catch @panic("out of memory");
+
+            //     std.fs.cwd().access(src_path, .{}) catch break :blk;
+
+            //     std.log.info("path: {s}", .{src_path});
+            //     // we found SDL2.dll
+            //     b.installBinFile(src_path, "SDL2.dll");
+            // }
+
+            zgui_c_cpp.linkSystemLibrary("SDL2");
+
             zgui_c_cpp.addCSourceFile(thisDir() ++ "/libs/imgui/backends/imgui_impl_sdl.cpp", cflags);
             zgui_c_cpp.addCSourceFile(thisDir() ++ "/libs/imgui/backends/imgui_impl_opengl3.cpp", cflags);
         },