6262 - Fixed faces positioning in journey diagram

[nghtlinh]

📑 Summary

This PR addresses the issue where faces in the Journey Diagram were not constrained below the horizontal activity line. Additionally, it resolves the problem of faces accepting non-integer and negative values.

Resolves #6262

📏 Design Decisions

• Added validation to check if the score is an integer between 0 and 5, throwing an error otherwise.
• Throwing an error will terminate the graph rendering if an invalid score is provided.
• Added e2e tests to verify that only valid integer scores within the range are accepted and that faces are correctly positioned.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 4.47%. Comparing base (ada42b8) to head (221474e).

Files with missing lines	Patch %	Lines
...kages/mermaid/src/diagrams/user-journey/svgDraw.js	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #6263      +/-   ##
==========================================
- Coverage     4.47%   4.47%   -0.01%     
==========================================
  Files          385     385              
  Lines        54191   54196       +5     
  Branches       598     598              
==========================================
  Hits          2425    2425              
- Misses       51766   51771       +5     

Flag	Coverage Δ
unit	4.47% <0.00%> (-0.01%)	⬇️

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

Files with missing lines	Coverage Δ
...kages/mermaid/src/diagrams/user-journey/svgDraw.js	0.00% <0.00%> (ø)

[nghtlinh]

@sidarthv96 Hey Sid! Our team (@nghtlinh @megantriplett @udvale) has been working on issue #6262. We added an alert dialog to let users know that the valid task score range for the journey diagram is 1-5. Also, we set the height for all tasks to 300. Does this match Mermaid's expected behavior? Let us know if you have any suggestions!