Use rich's traceback output

[mjordan]

The rich library (already required by Workbench) provides a way to print exception tracebacks so that they are much more readable. For example, Python's default looks like this:

Traceback (most recent call last):
  File "/home/mark/hacking/islandora_workbench/./workbench", line 1350, in <module>
    check_input(config, args)
  File "/home/mark/hacking/islandora_workbench/workbench_utils.py", line 1137, in check_input
    print("Foo" + none)
NameError: name 'none' is not defined. Did you mean: 'None'?

but rich produces exception tracebacks like this:

╭─────────────────────────────── Traceback (most recent call last) ────────────────────────────────╮
│ /home/mark/hacking/islandora_workbench/./workbench:1350 in <module>                              │
│                                                                                                  │
│   1347 │   │   │   if config['task'] == 'create_from_files':                                     │
│   1348 │   │   │   │   check_input_for_create_from_files(config, args)                           │
│   1349 │   │   │   else:                                                                         │
│ ❱ 1350 │   │   │   │   check_input(config, args)                                                 │
│   1351 except KeyboardInterrupt:                                                                 │
│   1352 │   print('Exiting before entire --check completed.')                                     │
│   1353 │   logging.warning('Workbench exiting after receiving "ctrl-c" during --check.')         │
│                                                                                                  │
│ /home/mark/hacking/islandora_workbench/workbench_utils.py:1137 in check_input                    │
│                                                                                                  │
│   1134 │   if config['id_field'] not in entity_fields:                                           │
│   1135 │   │   reserved_fields.append(config['id_field'])                                        │
│   1136 │                                                                                         │
│ ❱ 1137 │   print("foo" + None)                                                                   │
│   1138 │                                                                                         │
│   1139 │   # Check the config file.                                                              │
│   1140 │   tasks = [                                                                             │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
TypeError: can only concatenate str (not "NoneType") to str