add transwarp (#2916)

Co-authored-by: Your Name <you@example.com>

packages/t/transwarp/xmake.lua

@@ -0,0 +1,23 @@
+package("transwarp")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/bloomen/transwarp")
+    set_description("A header-only C++ library for task concurrency")
+    set_license("MIT")
+
+    add_urls("https://github.com/bloomen/transwarp/archive/refs/tags/$(version).zip")
+    add_versions("2.2.3", "41c45e1131233fed24ded3e5e49ec412e97b76bdeaf3bd7259a7c8c8f2f7189a")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include "transwarp.h"
+            namespace tw = transwarp;
+            void test() {
+                double x = 0;
+                auto parent1 = tw::make_task(tw::root, [&x]{ return 13.3 + x; })->named("something");
+            }
+        ]]}, {configs = {languages = "c++17"}}))
+    end)