fix: move from objects to Maps

[Yash-Singh1]

📑 Summary

Switches from objects to Maps in places where the keys accepted are user inputs.

Resolves #5451

📏 Design Decisions

Describe the way your implementation works or what design decisions you made if applicable.

This is a breaking change for v11 since it changes the structure of the databases and as such can break code that relies on the db, e.g.

https://github.com/excalidraw/mermaid-to-excalidraw/blob/d0b00dc63eeabd5e92ca3997650f47bf4901cb2c/src/parser/flowchart.ts#L226

📋 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.
• 🔖 targeted develop branch

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[codecov]

Codecov Report

Attention: Patch coverage is 0.52219% with 381 lines in your changes are missing coverage. Please review.

Project coverage is 5.72%. Comparing base (e68125e) to head (50c9ede).

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5468      +/-   ##
==========================================
- Coverage     5.73%   5.72%   -0.01%     
==========================================
  Files          277     278       +1     
  Lines        41999   42018      +19     
  Branches       515     490      -25     
==========================================
  Hits          2407    2407              
- Misses       39592   39611      +19     

Flag	Coverage Δ
unit	5.72% <0.52%> (-0.01%)	⬇️

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

Files	Coverage Δ
packages/mermaid/src/diagrams/gantt/ganttDb.js	77.47% <66.66%> (ø)
packages/mermaid/src/diagrams/sequence/svgDraw.js	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/class/classTypes.ts	0.00% <0.00%> (ø)
...ckages/mermaid/src/diagrams/gantt/ganttRenderer.js	0.00% <0.00%> (ø)
...ages/mermaid-flowchart-elk/src/flowRenderer-elk.js	0.00% <0.00%> (ø)
...ckages/mermaid/src/diagrams/class/classRenderer.js	0.00% <0.00%> (ø)
...ges/mermaid/src/diagrams/flowchart/flowRenderer.js	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/pie/pieRenderer.ts	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/er/erRenderer.js	0.00% <0.00%> (ø)
packages/mermaid/src/diagrams/pie/pieDb.ts	0.00% <0.00%> (ø)
... and 17 more

... and 1 file with indirect coverage changes

[sidharthv96]

Appreciate the effort! Can you take a look at the E2E failures?

[sidharthv96]

@Yash-Singh1 were you able to fix the tests?
Keeping this PR open for long will create more conflicts for you.

[Yash-Singh1]

Hi @sidharthv96, sorry for the late reply, I was busy with exams. I just fixed the e2e tests.

[sidharthv96]

No worries @Yash-Singh1! Hope they went well :)
Let's wait for a review from someone else as well, as the size is big.