Drop/replace term_image support

[dmcc]

While it's cool to display the DAG in the terminal, it's often unreadable (e.g., in VSCode). Perhaps it should be replaced with a better ASCII DAG renderer (https://pypi.org/project/asciidag/ ? https://pypi.org/project/stackeddag/ ?).

We also get this log spam on import a lot: (e.g., in Notebooks)

.../venv/lib/python3.10/site-packages/term_image/utils.py:749: TermImageWarning: It seems this process is not running within a terminal. Hence, some features will behave differently or be disabled.
See https://term-image.readthedocs.io/en/stable/guide/concepts.html#active-terminal
Any filter for this warning must be set before loading `term_image`, using `UserWarning` with the warning message (since `TermImageWarning` won't be available).
  warnings.warn(