cxxgraph: add package (#4019)

* cxxgraph: add package

* fix test

* add check

packages/c/cxxgraph/xmake.lua

@@ -0,0 +1,30 @@
+package("cxxgraph")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://zigrazor.github.io/CXXGraph")
+    set_description("Header-Only C++ Library for Graph Representation and Algorithms")
+    set_license("AGPL-3.0")
+
+    add_urls("https://github.com/ZigRazor/CXXGraph/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/ZigRazor/CXXGraph.git")
+
+    add_versions("v3.1.0", "54838d0d35a6f2685cf45e50e888146aef3c1a10fbbdddb939b3985c7953087a")
+
+    if on_check then
+        on_check("windows", function (package)
+            import("core.tool.toolchain")
+
+            local msvc = toolchain.load("msvc", {plat = package:plat(), arch = package:arch()})
+            if msvc then
+                local vs = msvc:config("vs")
+                assert(vs and tonumber(vs) >= 2022, "package(cxxgraph): need vs >= 2022")
+            end
+        end)
+    end
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:has_cxxtypes("CXXGraph::Graph<int>", {configs = {languages = "c++20"}, includes = {"algorithm", "CXXGraph/CXXGraph.hpp"}}))
+    end)