add display namespace method

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 37.50000% with 10 lines in your changes missing coverage. Please review.

Project coverage is 44.37%. Comparing base (ce51abc) to head (068d5ba). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/notebook_utils/notebook_utils.py	37.50%	10 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #105 +/- ## ========================================== - Coverage 44.61% 44.37% -0.25% ========================================== Files 7 7 Lines 446 462 +16 ========================================== + Hits 199 205 +6 - Misses 247 257 +10 ```

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