fix: show no longer raises or prints to stderr

[machow]

This PR addresses https://github.com/posit-dev/great-tables/issues/381, by...

• not raising at the end of every .show() call
• not logging http request info to stderr (which http.server handlers do by default)

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 66.66667% with 3 lines in your changes missing coverage. Please review.

Project coverage is 86.52%. Comparing base (813f3f3) to head (3debae6).

Files	Patch %	Lines
great_tables/_export.py	66.66%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #384 +/- ## ========================================== - Coverage 86.52% 86.52% -0.01% ========================================== Files 42 42 Lines 4594 4592 -2 ========================================== - Hits 3975 3973 -2 Misses 619 619 ```

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[machow]

@rich-iannone do you mind trying this locally, in a notebook and then in the IPython repl?

from great_tables import GT, exibble

GT(exibble).show()

from the repl it should open in the browser (and not raise an error afterward).