feat: Add Venn diagram

[exoego]

📑 Summary

Resolves #2583

📏 Design Decisions

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commit: 7aefbc3

[codecov]

Codecov Report

Attention: Patch coverage is 0.84507% with 352 lines in your changes missing coverage. Please review.

Project coverage is 4.61%. Comparing base (d16e46a) to head (7aefbc3).
Report is 139 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/mermaid/src/diagrams/venn/styles.ts	0.00%	162 Missing ⚠️
packages/mermaid/src/diagrams/venn/vennRenderer.ts	0.00%	90 Missing ⚠️
packages/mermaid/src/diagrams/venn/vennDB.ts	0.00%	58 Missing ⚠️
packages/mermaid/src/diagrams/venn/vennDetector.ts	0.00%	24 Missing ⚠️
packages/mermaid/src/diagrams/venn/vennDiagram.ts	0.00%	13 Missing ⚠️
...s/mermaid/src/diagram-api/diagram-orchestration.ts	0.00%	3 Missing ⚠️
.build/jsonSchema.ts	0.00%	1 Missing ⚠️
packages/mermaid/src/docs/.vitepress/config.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5932      +/-   ##
==========================================
- Coverage     4.64%   4.61%   -0.03%     
==========================================
  Files          374     380       +6     
  Lines        51965   52330     +365     
  Branches       613     592      -21     
==========================================
+ Hits          2414    2417       +3     
- Misses       49551   49913     +362     

Flag	Coverage Δ
unit	4.61% <0.84%> (-0.03%)	⬇️

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	45.38% <100.00%> (+0.61%)	⬆️
.build/jsonSchema.ts	0.00% <0.00%> (ø)
packages/mermaid/src/docs/.vitepress/config.ts	0.00% <0.00%> (ø)
...s/mermaid/src/diagram-api/diagram-orchestration.ts	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/venn/vennDiagram.ts	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/venn/vennDetector.ts	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/venn/vennDB.ts	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/venn/vennRenderer.ts	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/venn/styles.ts	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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