Separated settings into multiple tests

.gitignore

README.md

tests/s1-only-test/input/config_test.toml

tests/s1-only-test/input/meshes/test_mesh/block.elem

tests/s1-only-test/input/meshes/test_mesh/block.lon

tests/s1-only-test/input/meshes/test_mesh/block.pts

tests/s1-only-test/input/meshes/test_mesh/block.vec

tests/s1-only-test/input/meshes/test_mesh/block.vpts

tests/s1-only-test/input/meshes/test_mesh/mesher_cmd.txt

tests/s1-only-test/input/s1.par

tests/s1-s2-test/input/config_test.toml

tests/s1-s2-test/input/meshes/test_mesh/block.elem

tests/s1-s2-test/input/meshes/test_mesh/block.lon

tests/s1-s2-test/input/meshes/test_mesh/block.pts

tests/s1-s2-test/input/meshes/test_mesh/block.vec

tests/s1-s2-test/input/meshes/test_mesh/block.vpts

tests/s1-s2-test/input/meshes/test_mesh/mesher_cmd.txt

tests/s1-s2-test/input/s1.par

tests/s1-s2-test/input/s2.par

tests/s1-s2-test/reference-solution.txt