Move UI visualizer code out of this repo

[dangunter]

Fixes #1129

Related to IDAES/idaes-ui#11

Changes proposed in this PR:

• Remove visualizer code
• Add tests to verify correct operation
• Update docs accordingly

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[codecov]

Codecov Report

Patch coverage: 70.00% and project coverage change: -0.29% ⚠️

Comparison is base (9d958b1) 76.87% compared to head (3980fc3) 76.59%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1146      +/-   ##
==========================================
- Coverage   76.87%   76.59%   -0.29%     
==========================================
  Files         390      382       -8     
  Lines       61889    60822    -1067     
  Branches    11376    11200     -176     
==========================================
- Hits        47576    46584     -992     
+ Misses      11857    11822      -35     
+ Partials     2456     2416      -40     

Files Changed	Coverage Δ
idaes/core/base/flowsheet_model.py	88.78% <70.00%> (-3.35%)	⬇️

... and 6 files with indirect coverage changes

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[andrewlee94]

This looks OK to me. My only comment is that we should probably be adding some sort of pointer to documentation on how to install and set up the UI in the main IDAES docs.

[dangunter]

@andrewlee94 w.r.t. installation instructions I agree, and it was on my to-do list. In a perfect world that would go first. But I have noticed that the current version in main has a bug in the stream table, that didn't seem to lead to any complaints (but looks bad). So in the interest of simplicity, I'd like to just move forward with this PR and then add back instructions once I've got a less borked version of the UI working in the new repo.

[lbianchi-lbl]

I've left a suggestion to consider whether we need the added complexity of the wrapper class for this particular case since there's only one call site to handle. Otherwise looks good.

[CopyDemon]

I agree with the changes. I think it's a good idea to remove the UI from the main code and add it to its own repo. This will make the code more modular and easier to maintain.

I also agree with Andrew's comment that we should add some sort of pointer to documentation on how to install and set up the UI in the main IDAES docs. This will make it easier for users to get started with the UI. Or we can make some automation install when they install IDAES.

[lbianchi-lbl]

• The conflict should be trivial (files being deleted here were modified in Spring cleaning for dependencies, Pt. 2: The Tree-Chopping #1133)
• We should be able to merge this soon

[lbianchi-lbl]

Waiting on @dangunter and/or @lbianchi-lbl to fix the git conflicts.