Add TransferWindow enum to constants and export it from index

[mj-kiwi]

📝 Description

Add a new TransferWindow enum to the constants file and export it from the index to provide a standardized way to reference transfer windows across the project.

🔄 What Changed?

• Added TransferWindow enum in constants.ts
• Exported TransferWindow from the index.ts

🚀 Why?

• Standardize transfer window references to reduce hardcoded strings
• Improve type safety and maintainability across the codebase

🧪 How to Test?

• Manual testing steps:

  1. Import TransferWindow in a component or service
  2. Verify that enum values match expected transfer window definitions
  3. Confirm no runtime errors occur when using the enum

• Automated tests added/updated

• All existing tests pass

⚠️ Breaking Changes

• No breaking changes
• Breaking changes (describe below):

📋 Checklist

• Code follows the project's coding standards
• Self-review completed
• Documentation updated (if needed)
• Tests added/updated
• Changelog updated (if needed)
• All CI checks pass

🔗 Related Issues

Closes #
Related to #

📚 Additional Notes

This enum will be useful for future updates where transfer windows need to be referenced in a type-safe way.

---

Note

Introduce TransferWindow enum with common second-based intervals and export it from the package index.

• Constants (packages/delegation-toolkit/src/constants.ts):
  • Add TransferWindow enum with second-based intervals: Hourly, Daily, Weekly, BiWeekly, Monthly, Quarterly, Yearly.
• Public API (packages/delegation-toolkit/src/index.ts):
  • Export TransferWindow alongside Implementation.

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[jeffsmale90]

LGTM! @AyushBherwani1998 fyi