Added port constrain to list scheduler, added example and updated tests

.gitlab-ci.yml

b_asic/architecture.py

b_asic/core_schedulers.py

b_asic/resources.py

b_asic/scheduler.py

examples/auto_scheduling_with_custom_io_times.py

examples/ldlt_matrix_inverse.py

examples/memory_constrained_scheduling.py

test/integration/test_sfg_to_architecture.py

...e_images/test_resources/test_draw_matrix_transposer_4.png

...ne_images/test_resources/test_draw_process_collection.png

..._images/test_resources/test_left_edge_cell_assignment.png

..._images/test_resources/test_max_min_lifetime_bar_plot.png

...ges/test_schedule/test__get_figure_no_execution_times.png

test/unit/test_architecture.py

test/unit/test_codegen.py

test/unit/test_core_operations.py

test/unit/test_core_schedulers.py

test/unit/test_graph_id_generator.py

test/unit/test_gui.py