Standardized timeline definitions

[Yokozuna59]

📑 Summary

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Resolves #

📏 Design Decisions

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

📋 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

[codecov]

Codecov Report

Merging #4711 (e6d8bfd) into develop (b85c011) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4711      +/-   ##
===========================================
- Coverage    77.04%   77.02%   -0.02%     
===========================================
  Files          144      144              
  Lines        14565    14565              
  Branches       586      592       +6     
===========================================
- Hits         11221    11219       -2     
  Misses        3233     3233              
- Partials       111      113       +2     

Flag	Coverage Δ
e2e	83.88% <100.00%> (-0.02%)	⬇️
unit	45.32% <66.66%> (-0.02%)	⬇️

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

Files Changed	Coverage Δ
...ckages/mermaid/src/diagrams/timeline/timelineDb.ts	91.48% <ø> (ø)
...es/mermaid/src/diagrams/timeline/timelineStyles.ts	100.00% <ø> (ø)
...s/mermaid/src/diagram-api/diagram-orchestration.ts	39.53% <100.00%> (ø)
.../mermaid/src/diagrams/timeline/timelineDetector.ts	90.90% <100.00%> (ø)
...s/mermaid/src/diagrams/timeline/timelineDiagram.ts	100.00% <100.00%> (ø)

[Yokozuna59]

The current timeline files need more work and a lot of breaking changes, I'll be working on journey instead for now.