⚡ Spark: slugify transformation

[galiprandi]

💡 What: Added a new slugify transformation to the valueTransforms utility and Input component.

🎯 Why: Developers frequently need to convert user input (like titles or names) into URL-friendly slugs for permalinks, IDs, or filenames. This is a common requirement in forms and content management interfaces.

📦 What it adds:

• A new "slugify" option to the TransformType union.
• Robust implementation in valueTransforms that handles:
  • Unicode normalization (NFD) to decompose and remove diacritics (accents).
  • Trimming and lowercase conversion.
  • Replacement of non-alphanumeric character sequences (including spaces, underscores, and hyphens) with single hyphens.
  • Removal of leading and trailing hyphens.

🚀 How to use:

<Input
  label="Post Title"
  transform="slugify"
  onChangeValue={(slug) => console.log(slug)} // "Héllo World!" -> "hello-world"
/>

♻️ Deps Free: Confirmed. Uses only native JavaScript string methods and built-in Unicode normalization.

🎨 Harmony: Fits perfectly with the library's existing patterns. By extending the centralized valueTransforms utility, the new transformation is automatically type-safe and available in the Input component via the existing transform prop. Added comprehensive tests in lib/utilities/strings.test.ts.

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PR created automatically by Jules for task 4898550752951199275 started by @galiprandi

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