[WXFile] determine widget usage by runtime env in _ipython_display_

[marscher]

Fixes #846

Changes

In _ipython_display_ we assumed, that it will only be called in a Jupyter lab environment. This ain't true - within a Sphinx environment it's also called. So we just let this state be determined automatically.

Related Issues

Closes #846

Checks

• updated CHANGELOG.rst
• updated tests
• updated doc/
• update example/tutorial notebooks
• update manifest file

[codecov]

Codecov Report

Merging #848 (6126717) into master (d1263a4) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #848      +/-   ##
==========================================
- Coverage   96.60%   96.59%   -0.02%     
==========================================
  Files          95       95              
  Lines        6222     6222              
==========================================
- Hits         6011     6010       -1     
- Misses        211      212       +1     

Impacted Files	Coverage Δ
weldx/asdf/file.py	96.27% <ø> (ø)
weldx/asdf/util.py	90.88% <0.00%> (-0.32%)	⬇️

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[github-actions]

Test Results

2 187 tests  ±0   2 186 ✔️ ±0   2m 36s ⏱️ -47s
       1 suites ±0          1 💤 ±0 
       1 files   ±0          0 ❌ ±0 

Results for commit 6126717. ± Comparison against base commit d1263a4.

[marscher]

Now the extended notebook about WXfile renders correctly (https://weldx--848.org.readthedocs.build/en/848/tutorials/weldxfile.html)