Update class diagram to v3 using new renderer

[yari-dewalt]

📑 Summary

Updates the class diagram to the new unified way of rendering. Includes a new "classBox" shape to be used in diagrams as well as some other updates such as: the option to hide the empty members box in class diagrams, support for handDrawn look, and the introduction of the classDef statement into class diagrams.

📏 Design Decisions

• The classDb gathers the necessary data and passes it to the v3 unified renderer.
• The classBox shape is kind of complicated due to the placement and possibility of different text (annotations and members as opposed to just a plain label) as well as taking in classNode information, so it's made a little awkward. It utilizes some helper functions defined in shapeUtil to accomplish this, although I am not sure this is the best way to go about it.
• The syntax of the class diagram and its use of specific symbols also conflicts with text creation in terms of how HTML and markdown is treated (opening and closing tags <>, - being used for lists, * being used at the end for a classifier, etc.) and so there are workarounds / hacks in place. I tried to not stray away from the typical process and so I am unsure about how acceptable these workarounds are and if they are the best method, but can revise and fix if needed.
• The classDef statement works similarly as it does in other diagrams and defines a class that can be used in the diagram (either via the shorthand ::: or a cssClass statement).

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
• 🦋 If your PR makes a change that should be noted in one or more packages' changelogs, generate a changeset by running pnpm changeset and following the prompts. Changesets that add features should be minor and those that fix bugs should be patch. Please prefix changeset messages with feat:, fix:, or chore:.

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commit: 41f2286

[codecov]

Codecov Report

Attention: Patch coverage is 0.44577% with 670 lines in your changes missing coverage. Please review.

Project coverage is 4.94%. Comparing base (a07f1f3) to head (41f2286).

Files with missing lines	Patch %	Lines
packages/mermaid/src/diagrams/class/shapeUtil.ts	0.00%	219 Missing ⚠️
...ndering-util/rendering-elements/shapes/classBox.ts	0.00%	176 Missing ⚠️
packages/mermaid/src/diagrams/class/classDb.ts	0.00%	169 Missing ⚠️
...aid/src/diagrams/class/classRenderer-v3-unified.ts	0.00%	79 Missing ⚠️
packages/mermaid/src/diagrams/class/classTypes.ts	0.00%	20 Missing ⚠️
...mermaid/src/rendering-util/handle-markdown-text.ts	0.00%	2 Missing ⚠️
...aid/src/rendering-util/rendering-elements/nodes.js	0.00%	2 Missing ⚠️
...ages/mermaid/src/diagrams/class/classDiagram-v2.ts	0.00%	1 Missing ⚠️
...ackages/mermaid/src/diagrams/class/classDiagram.ts	0.00%	1 Missing ⚠️
packages/mermaid/src/utils.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5880      +/-   ##
==========================================
- Coverage     5.00%   4.94%   -0.07%     
==========================================
  Files          337     340       +3     
  Lines        48209   48876     +667     
  Branches       576     579       +3     
==========================================
+ Hits          2413    2416       +3     
- Misses       45796   46460     +664     

Flag	Coverage Δ
unit	4.94% <0.44%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/mermaid/src/defaultConfig.ts	45.18% <100.00%> (+0.61%)	⬆️
...ages/mermaid/src/diagrams/class/classDiagram-v2.ts	0.00% <0.00%> (ø)
...ackages/mermaid/src/diagrams/class/classDiagram.ts	0.00% <0.00%> (ø)
packages/mermaid/src/utils.ts	41.67% <0.00%> (-0.05%)	⬇️
...mermaid/src/rendering-util/handle-markdown-text.ts	0.00% <0.00%> (ø)
...aid/src/rendering-util/rendering-elements/nodes.js	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/class/classTypes.ts	0.00% <0.00%> (ø)
...aid/src/diagrams/class/classRenderer-v3-unified.ts	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/class/classDb.ts	0.00% <0.00%> (ø)
...ndering-util/rendering-elements/shapes/classBox.ts	0.00% <0.00%> (ø)
... and 1 more

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Build	Status	Details	Updated (UTC)
default (Inspect)	⚠️ Changes detected (Review)	46 changed, 56 added	Sep 19, 2024, 8:13 PM