fix: resolve initHealthKit results type

[jiwooIncludeJeong]

Description

• initHealthKit result type set HealthValue. but it gives only number
• I added InitHealthKitResultCode enum and apply it to result type

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation
• [x] I have checked my code and corrected any misspellings