Graph Views, Doc Updates and Specialize & Inherit Asset Units

[chrizzFTD]

• Enabled CI matrix to test:
  • Python-3.9, PySide2, USD-22.5
  • Python-3.11, PySide6, USD-24.03 (latest)
• Moved pygraphviz to the full requirements and updated install instructions for Maya-2024 and Houdini-20.0.
• Added specialized and inherited edit contexts for asset units, which will direct edits to the corresponding specializes and inherits arcs.
• Use of weakref to prevent handles to USD objects on temporary widgets.
• _GeomPrimvarInfo now retrieves constant primvars from Gprim instead of Imageable schemas.
• Added a ConnectableAPIViewer widget, accessible through menus on Maya, Houdini and USDView:
• Added ability to filter edges by arc details on LayerStackComposition:
• Added a custom _GraphicsViewport widget (inheriting QGraphicsView) to navigate graphs more interactively (also to avoid use of QWebEngineWidgets)
  • Used in TaxonomyEditor, ConnectableAPIViewer, LayerStackComposition
• Added _SvgPixmapViewport to avoid use of QWebEngineWidgets for PrimComposition widget.
• Extended USDView prim context menu selection with:
  • 
  • 
• Updated doc images and links to openusd.org
• Updated doc theme to use Shibuya

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 88.08163% with 146 lines in your changes are missing coverage. Please review.

Project coverage is 92.63%. Comparing base (36b6fb2) to head (7c228f1). Report is 23 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #35 +/- ## =========================================== + Coverage 91.93% 92.63% +0.69% =========================================== Files 10 17 +7 Lines 1116 3665 +2549 =========================================== + Hits 1026 3395 +2369 - Misses 90 270 +180 ``` | [Files](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill) | Coverage Δ | | |---|---|---| | [grill/cook/\_\_init\_\_.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvY29vay9fX2luaXRfXy5weQ==) | `99.64% <100.00%> (ø)` | | | [grill/usd/\_\_init\_\_.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdXNkL19faW5pdF9fLnB5) | `100.00% <100.00%> (ø)` | | | [grill/views/\_qt.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3MvX3F0LnB5) | `80.00% <100.00%> (ø)` | | | [grill/views/create.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3MvY3JlYXRlLnB5) | `89.69% <100.00%> (+6.59%)` | :arrow_up: | | [grill/views/sheets.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3Mvc2hlZXRzLnB5) | `93.15% <100.00%> (+5.45%)` | :arrow_up: | | [tests/test\_cook.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-dGVzdHMvdGVzdF9jb29rLnB5) | `100.00% <100.00%> (ø)` | | | [tests/test\_usd.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-dGVzdHMvdGVzdF91c2QucHk=) | `100.00% <100.00%> (ø)` | | | [tests/test\_views.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-dGVzdHMvdGVzdF92aWV3cy5weQ==) | `99.82% <100.00%> (-0.18%)` | :arrow_down: | | [grill/views/description.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3MvZGVzY3JpcHRpb24ucHk=) | `92.89% <99.35%> (+2.27%)` | :arrow_up: | | [grill/views/\_core.py](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill#diff-Z3JpbGwvdmlld3MvX2NvcmUucHk=) | `91.66% <88.88%> (ø)` | | | ... and [1 more](https://app.codecov.io/gh/thegrill/grill/pull/35?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill) | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/thegrill/grill/pull/35/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=thegrill)