feat: enhance text splitting with Intl.Segmenter support

[mRcOol7]

📑 Summary

This PR enhances the text splitting functionality by incorporating support for Intl.Segmenter. This improvement allows for more accurate segmentation of text into graphemes and words, providing a better user experience in applications that require text manipulation.

Resolves #4408

📏 Design Decisions

The implementation utilizes Intl.Segmenter to split strings into graphemes and words more effectively than previous methods. If Intl.Segmenter is not available, it falls back to traditional character and space-based splitting. This ensures compatibility across different environments and improves overall performance.

📋 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.
• 🦋 If your PR makes a change that should be noted in one or more packages' changelogs, generate a changeset by running pnpm changeset and following the prompts. Changesets that add features should be minor and those that fix bugs should be patch. Please prefix changeset messages with feat:, fix:, or chore:.

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Latest commit: 5de21c4

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 49 lines in your changes missing coverage. Please review.

Project coverage is 4.66%. Comparing base (86a9159) to head (238e1a4).

Files with missing lines	Patch %	Lines
packages/mermaid/src/rendering-util/splitText.ts	0.00%	49 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5942      +/-   ##
==========================================
- Coverage     4.67%   4.66%   -0.01%     
==========================================
  Files          373     373              
  Lines        51680   51696      +16     
  Branches       586     586              
==========================================
  Hits          2414    2414              
- Misses       49266   49282      +16     

Flag	Coverage Δ
unit	4.66% <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
packages/mermaid/src/rendering-util/splitText.ts	0.00% <0.00%> (ø)

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[sidharthv96]

This PR does absolutely nothing mentioned in the description. It just adds a bunch of comments, probably by an LLM, and downgrades dependencies.

Seems like Hacktober fest has started.