Added zen_temple as a submodule and included documentation for visualization

Closes Issue # (if applicable).

Changes proposed in this Pull Request

[x] Code changes have been tested locally.
[x] Code changes are sufficiently documented, i.e. new functions contain docstrings and further explanations may be given in docs.
[ ] A note for the release notes docs/files/release_notes.rst is included.
[x] Breaking changes are documented in the docs and are communicated to the user (if applicable).
[x] Newly introduced dependencies are added to pyproject.toml (if applicable).
[x] Tests for new features were added (if applicable).