Check_mypy_import_errors hok fails for projects with updated toml tables

[pedwrds]

More recent versions (>=2.0) of poetry are moving towards a more PEP compliant pyproject.toml. Some of the toml table headers have been updated so references to the table can fail.

One such example is hooks/check_mypy_import_errors.py calling PyprojectFile.package_name() from utils/pyproject_file.py to retrieve the project name, example error below:

Check for mypy import errors.............................................Failed
- hook id: check-mypy-import-errors
- exit code: 1

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/Users/pedwrds/repos/tests/tomltest/.venv/lib/python3.12/site-packages/hooks/check_mypy_import_errors.py", line 103, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/pedwrds/repos/tests/tomltest/.venv/lib/python3.12/site-packages/hooks/check_mypy_import_errors.py", line 99, in main
    return CheckMypyImportErrors().run()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pedwrds/repos/tests/tomltest/.venv/lib/python3.12/site-packages/hooks/check_mypy_import_errors.py", line 65, in run
    mypy_stdout, mypy_err, _ = mypy.run([setup_file.package_name])
                                         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pedwrds/repos/tests/tomltest/.venv/lib/python3.12/site-packages/hooks/utils/pyproject_file.py", line 21, in package_name
    return str(self.contents["tool"]["poetry"]["name"])
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
KeyError: 'name'

We should be able to try and except on keyError to handle this...