DRAFT CT-3243 | JSON settings uploading implemented & Settings Keys adjustments

[RafalOzogJudopay]

1. Implements JSON settings uploading mechanism in both Swift and ObjC exemplary apps, as it's been done in Android.
2. Adjusts names of settings keys to proper camel case where necessary. Fixes naming inconsistencies between iOS and Android. Aim of these changes is to make both Android and iOS using the same json configs in Maestro tests.
3. Demo Swift:
   https://github.com/user-attachments/assets/309660b0-4fc7-481f-8193-e0006682f0a8
4. Demo ObjC:
   https://github.com/user-attachments/assets/aa9984e1-0236-47d6-af95-4ede5063ccc0

[sonarqubecloud]

Quality Gate failed

Failed conditions
17 Security Hotspots
11.3% Coverage on New Code (required ≥ 80%)
C Reliability Rating on New Code (required ≥ A)

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