chore: ts-ignore comment was misleading, JISON doesn't support types

[Incognito]

📑 Summary

Fixing multiple issues that were uncovered in a different PR review. Updating everything to remove the number of historical defects new contributors unwittingly carry forward.

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.
• 🔖 targeted develop branch

[Incognito]

fyi @sidharthv96

[codecov]

Codecov Report

Merging #4689 (4cdb43f) into develop (a3c645c) will decrease coverage by 0.13%.
Report is 75 commits behind head on develop.
The diff coverage is n/a.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4689      +/-   ##
===========================================
- Coverage    77.13%   77.00%   -0.13%     
===========================================
  Files          143      144       +1     
  Lines        14535    14583      +48     
  Branches       516      563      +47     
===========================================
+ Hits         11211    11230      +19     
- Misses        3219     3243      +24     
- Partials       105      110       +5     

Flag	Coverage Δ
e2e	83.89% <ø> (-0.20%)	⬇️
unit	45.32% <ø> (ø)

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

Files Changed	Coverage Δ
packages/mermaid/src/diagrams/c4/c4Diagram.ts	100.00% <ø> (ø)
...ages/mermaid/src/diagrams/class/classDiagram-v2.ts	60.00% <ø> (ø)
...s/mermaid/src/diagrams/flowchart/flowDiagram-v2.ts	75.00% <ø> (ø)
...ackages/mermaid/src/diagrams/gantt/ganttDiagram.ts	100.00% <ø> (ø)
...ckages/mermaid/src/diagrams/git/gitGraphDiagram.ts	100.00% <ø> (ø)
...mermaid/src/diagrams/mindmap/mindmap-definition.ts	100.00% <ø> (ø)
packages/mermaid/src/diagrams/pie/pieDiagram.ts	100.00% <ø> (ø)
...aid/src/diagrams/quadrant-chart/quadrantDiagram.ts	100.00% <ø> (ø)
...aid/src/diagrams/requirement/requirementDiagram.ts	100.00% <ø> (ø)
...s/mermaid/src/diagrams/sequence/sequenceDiagram.ts	100.00% <ø> (ø)
... and 3 more

... and 5 files with indirect coverage changes