Add tutorial about reading WelDX files

[vhirtham]

Changes

Add the first tutorial about reading a WelDX file

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[codecov]

Codecov Report

Merging #556 (624cc94) into new_tutorials (d4def7d) will increase coverage by 0.03%.
The diff coverage is n/a.

❗ Current head 624cc94 differs from pull request most recent head 42dceee. Consider uploading reports for the commit 42dceee to get more accurate results

@@                Coverage Diff                @@
##           new_tutorials     #556      +/-   ##
=================================================
+ Coverage          94.67%   94.71%   +0.03%     
=================================================
  Files                 93       93              
  Lines               5768     5768              
=================================================
+ Hits                5461     5463       +2     
+ Misses               307      305       -2     

Impacted Files	Coverage Δ
weldx/asdf/file.py	96.32% <0.00%> (+0.81%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d4def7d...42dceee. Read the comment docs.

[github-actions]

Unit Test Results

       1 files  ±  0         1 suites  ±0   3m 13s ⏱️ +41s
1 920 tests +18  1 920 ✔️ +18  0 💤 ±0  0 ❌ ±0 

Results for commit ef98163. ± Comparison against base commit 353f7b4.

♻️ This comment has been updated with latest results.

[vhirtham]

I think the first tutorial is now ready to be merged after I added the new info method. I also added a new section on the "Getting started" page for it.

[CagtayFabry]

maybe we should add a hint that the tutorials are really supposed to run in an interactive environment rather than the static homepage to work best