Feature/818 add remove delay to until after and Fix/5867

[mutricyl]

📑 Summary

Possibility to define a task start an end date relative to others is extended in this work:

• after and until keywords can now be used for start date and end date
• when after/until is used it is now possible to add a delay (in form of a duration). For example: 5 days after the end of task1 5d after task1

Working on that subject forced me to solve the duration issue when until is used with excluded dates #5867

Resolves #818
Resolves #5867

📏 Design Decisions

A dedicated function have been created to manage after/until keywords which is called by getStartDate and getEndDate.

fixTaskDates and checkTaskDates usage is restricted to date definition where duration is used to help resolve the duration issue when exclude is used.

task.renderEndTime is always defined to help resolve issue #5867

📋 Tasks

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• 📖 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.
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Latest commit: 7506dff

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Codecov Report

Attention: Patch coverage is 88.15789% with 9 lines in your changes missing coverage. Please review.

Project coverage is 3.92%. Comparing base (d602240) to head (7506dff).

Files with missing lines	Patch %	Lines
packages/mermaid/src/diagrams/gantt/ganttDb.js	88.15%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #6376      +/-   ##
==========================================
+ Coverage     3.86%   3.92%   +0.06%     
==========================================
  Files          402     401       -1     
  Lines        42682   42703      +21     
  Branches       644     653       +9     
==========================================
+ Hits          1648    1676      +28     
+ Misses       41034   41027       -7     

Flag	Coverage Δ
unit	3.92% <88.15%> (+0.06%)	⬆️

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

Files with missing lines	Coverage Δ
packages/mermaid/src/diagrams/gantt/ganttDb.js	76.95% <88.15%> (+0.46%)	⬆️

... and 1 file with indirect coverage changes

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No changes detected	-	Mar 13, 2025, 11:30 AM