Add more repr to enable better examples

b_asic/resources.py

b_asic/schedule.py

b_asic/signal_flow_graph.py

examples/connectmultiplesfgs.py

examples/firstorderiirfilter.py

examples/folding_example_with_architecture.py

examples/introduction.py

examples/schedulingexample.py

examples/threepointwinograddft.py