Add package: GaussianLib (#7952)

* Add package: GaussianLib

Add package: GaussianLib (github.com/LukasBanana/GaussianLib)

* Update xmake.lua

---------

Co-authored-by: Saikari <[email protected]>

packages/g/gaussianlib/xmake.lua

@@ -0,0 +1,30 @@
+package("gaussianlib")
+    set_kind("library", {headeronly = true})
+
+    set_description("Basic linear algebra C++ library for 2D and 3D applications")
+    set_homepage("https://github.com/LukasBanana/GaussianLib")
+    set_license("BSD-3-Clause")
+
+    add_urls("https://github.com/LukasBanana/GaussianLib.git")
+
+    add_versions("2024.12.31", "d988f87f2bb20a3c41fa1f20c2d0f132ae7545c5")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <Gauss/Gauss.h>
+            #include <iostream>
+            static const Gs::Real pi = Gs::Real(3.141592654);
+            
+            void test() {
+                Gs::Vector4 a(1, 2, 3, 4), b(-12, 0.5f, 0, 1);
+                const Gs::Vector2 c(42, 19);
+                Gs::Matrix<double, 3, 4> A;
+                Gs::Matrix<double, 4, 3> B;
+            }
+        ]]}, {configs = {languages = "cxx11"}}))
+
+    end)