Penerapan Contextual Teaching Learning Pada Mata Pelajaran Pendidikan Agama Kristen Sebagai Strategi Pengembangan Spiritual Peserta Didik Di Sma Negeri 2 Jayapura: The Application of Contextual Teaching Learning in Christian Religious Education Subjects as a Spiritual Development Strategy for Students at SMA Negeri 2 Jayapura (Sekolah Tinggi Filsafat Teologi GKI)