enssdk: Migrate `charSplit` and `charCount` functions from `namekit/ens-utils`

[Y3drk]

Goal

Make use of these utility functions without using the legacy package.

Requirements

• Copy / paste from the ens-utils:
  • The charSplit and charCount functions
  • Their JSDocs
  • Their unit tests
• Make use of these functions in getContractCardENSNameFieldStyles function in ENSAwards

Additional info

• Aforementioned functions in the namekit monorepo
• Comment on which the task is based on

[coderabbitai]

🔗 Related PRs

#1551 - feat(namehash-ui): refine package [merged]

---

📝 Issue Planner

_{Check the box below or use the @coderabbitai plan command to generate an implementation plan and prompts that you can use with your favorite coding assistant.}

• Create Plan

---

🧪 Issue enrichment is currently in open beta.

You can configure auto-planning by selecting labels in the issue_enrichment configuration.

To disable automatic issue enrichment, add the following to your .coderabbit.yaml:

issue_enrichment:
  auto_enrich:
    enabled: false

💬 Have feedback or questions? Drop into our discord!