feat(stroid): first working version

stroid generates o-grid topologies with proper boundary conditions applied. Currently the external domain does not work, this will be addressed in the next commit.

build-config/libconfig/meson.build

@@ -0,0 +1,7 @@
+config_p = subproject('libconfig',
+default_options:[
+  'pkg_config=' + get_option('pkg_config').to_string(),
+  'build_tests=' + get_option('build_tests').to_string(),
+  'build_examples=false'
+])
+config_dep  = config_p.get_variable('config_dep')