Adding gegelati library package (#33686)

* testing ssh key
* test
* LR : Creating the packge to install the gegelati app
* LR : Gegelati, a TPG C++ library added and fully tested
* LR : adjusting for fork
* LR: taking out the boilerplates
* LR: taking out the rest

var/spack/repos/builtin/packages/gegelati/package.py

@@ -0,0 +1,25 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class Gegelati(CMakePackage):
+    """Class to add the a TPG library(gegelati) into Spack"""
+
+    homepage = "https://github.com/gegelati/gegelati"
+    url = "https://github.com/gegelati/gegelati/archive/refs/tags/v1.2.0.tar.gz"
+
+    # notify when the package is updated.
+    maintainers = ["lucascarvalhoroncoroni"]
+
+    version("1.2.0", sha256="039997c7d6cb394f910f6c40620165b32094e0c85c170be01eb74b55488a1d4c")
+
+    depends_on("sdl2")
+    depends_on("doxygen")
+
+    def cmake_args(self):
+        args = []
+        return args