maddy: add package (#2466)

packages/m/maddy/xmake.lua

@@ -0,0 +1,23 @@
+package("maddy")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/progsource/maddy")
+    set_description("C++ Markdown to HTML header-only parser library")
+    set_license("MIT")
+
+    add_urls("https://github.com/progsource/maddy/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/progsource/maddy.git")
+
+    add_versions("1.2.1", "b6058bce7ca32506969633ee7a4042e75b07464489f1c44be00913543cd687ef")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <maddy/parser.h>
+            void test() {
+                auto var = maddy::ParserConfig();
+            }
+        ]]}, {configs = {languages = "c++14"}}))
+    end)