Add c++23 kernel (#198)

* Add c++23 kernel

Author: mcbarton

CMakeLists.txt

@@ -184,6 +184,7 @@ if(EMSCRIPTEN)
 else()
     configure_native_kernel("/share/jupyter/kernels/xcpp17/")
     configure_native_kernel("/share/jupyter/kernels/xcpp20/")
+    configure_native_kernel("/share/jupyter/kernels/xcpp23/")
 endif()
 
 # Source files

share/jupyter/kernels/xcpp23/kernel.json.in

@@ -0,0 +1,18 @@
+{
+  "display_name": "C++23",
+  "env": {
+      "PATH":"@XEUS_CPP_PATH@",
+      "LD_LIBRARY_PATH":"@XEUS_CPP_LD_LIBRARY_PATH@"
+  },
+  "argv": [
+      "@XEUS_CPP_KERNELSPEC_PATH@xcpp",
+      "-f",
+      "{connection_file}",
+      "-resource-dir", "@XEUS_CPP_RESOURCE_DIR@",
+      "-I", "@XEUS_CPP_INCLUDE_DIR@",
+      "-std=c++23"@XEUS_CPP_OMP@
+  ],
+  "language": "cpp",
+  "metadata": {"debugger": false
+  }
+}