🗑️ Deprecation of toPositiveInt extension function with warning level

[LVMVRQUXL]

📝 Description

We would like to deprecate the Number.toPositiveInt() extension function with a warning level for using the PositiveInt.Companion.create(Number) function instead, introduced by #349.

🔗 Dependencies

This issue is blocked by the following ones:

• ✨ Stabilization of PositiveInt.Companion.create* factory functions #458

✅ Checklist

• Deprecate the declaration with a warning level, refactor its usages and update the unreleased changelog.
• Close this issue as completed and update tracking ones if present.

[LVMVRQUXL]

Another implementation of the PositiveInt type will be implemented in #637.