build(meshIO): defined meshio_ dependency

libraries which need mesh_io can now use meshio_dep which will automatically link and include headers for meshIO

src/meshIO/meson.build

@@ -15,5 +15,9 @@ libmeshIO = static_library('meshIO',
     dependencies: [mfem_dep],
     install : true)
 
-# Make headers accessible
+meshio_dep = declare_dependency(
-install_headers(meshIO_headers, subdir : '4DSSE/meshIO')
+    include_directories: include_directories('public'),
+    link_with: libmeshIO,
+    sources: meshIO_sources,
+    dependencies: [mfem_dep]
+)