[WIP] refactor: make sequence/svgDraw typesafe

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:bookmark_tabs: Summary

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Codecov Report

Attention: Patch coverage is 0% with 360 lines in your changes are missing coverage. Please review.

Project coverage is 5.71%. Comparing base (3809732) to head (c5b3535).

Additional details and impacted files

[](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) ```diff @@ Coverage Diff @@ ## develop #5484 +/- ## ========================================== - Coverage 5.72% 5.71% -0.01% ========================================== Files 278 277 -1 Lines 42013 42083 +70 Branches 490 515 +25 ========================================== Hits 2407 2407 - Misses 39606 39676 +70 ``` | [Flag](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) | Coverage Δ | | |---|---|---| | [unit](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) | `5.71% <0.00%> (-0.01%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js) | Coverage Δ | | |---|---|---| | [.../mermaid/src/diagrams/sequence/sequenceRenderer.ts](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484?src=pr&el=tree&filepath=packages%2Fmermaid%2Fsrc%2Fdiagrams%2Fsequence%2FsequenceRenderer.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js#diff-cGFja2FnZXMvbWVybWFpZC9zcmMvZGlhZ3JhbXMvc2VxdWVuY2Uvc2VxdWVuY2VSZW5kZXJlci50cw==) | `0.00% <0.00%> (ø)` | | | [...kages/mermaid/src/diagrams/common/svgDrawCommon.ts](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484?src=pr&el=tree&filepath=packages%2Fmermaid%2Fsrc%2Fdiagrams%2Fcommon%2FsvgDrawCommon.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js#diff-cGFja2FnZXMvbWVybWFpZC9zcmMvZGlhZ3JhbXMvY29tbW9uL3N2Z0RyYXdDb21tb24udHM=) | `0.00% <0.00%> (ø)` | | | [packages/mermaid/src/diagrams/sequence/svgDraw.ts](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484?src=pr&el=tree&filepath=packages%2Fmermaid%2Fsrc%2Fdiagrams%2Fsequence%2FsvgDraw.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js#diff-cGFja2FnZXMvbWVybWFpZC9zcmMvZGlhZ3JhbXMvc2VxdWVuY2Uvc3ZnRHJhdy50cw==) | `0.00% <0.00%> (ø)` | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/mermaid-js/mermaid/pull/5484/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mermaid-js)