obfusheader.h: add package (#6630)

* obfusheader.h: add package

* fix size_t

* fix grammer

packages/o/obfusheader.h/xmake.lua

@@ -0,0 +1,22 @@
+package("obfusheader.h")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/ac3ss0r/obfusheader.h")
+    set_description("Obfusheader.h is a portable header file for C++14 compile-time obfuscation.")
+    set_license("Apache-2.0")
+
+    add_urls("https://github.com/ac3ss0r/obfusheader.h.git")
+    add_versions("2024.08.19", "cbd87b0edd2695764d08110cf5a192b193218aef")
+
+    on_install(function (package)
+        os.vcp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <cstddef>
+            #include <obfusheader.h>
+            void test() {
+                const char* str = OBF("test");
+            }
+        ]]}, {configs = {languages = "c++14"}}))
+    end)