🗑️ Deprecation of toStrictlyPositiveInt function with warning level

[LVMVRQUXL]

📝 Description

We want to deprecate the Number.toStrictlyPositiveInt() function with a warning level, for using the new factory functions in the StrictlyPositiveInt.Companion type, introduced by #770 and stabilized by #774.

🔗 Dependencies

This issue is blocked by the following items:

• ✨ Stabilization of orNull and orThrow functions in StrictlyPositiveInt.Companion type #774

✅ Checklist

See the Issue implementation section in the contributing guidelines before addressing the following checklist.

• 🗑️ Deprecate the toStrictlyPositiveInt function.
• 📝 Update the unreleased changelog for this issue.
• 📝 After closing this issue, update the milestone of tracking issues depending only on this one.