chore: in-app messaging fixes and improvements

[mrehan27]

part of: MBL-538, MBL-546
blocked by: customerio/customerio-ios#821

Changes

• Exposed push and in-app modules in TS files
• Renamed in-app messaging native module classes to match TS files expectations
• Cleaned up SDK initialization in iOS native files
• Simplified parsing of configs in native files
• Included in-app messaging native files
• Simplified iOS logger to align with Android
• Refactored some code and moved it to different files for improved readability
• Removed unnecessary constants, TODOs, and unused code
• Updated lock and project files

[github-actions]

Sample app builds 📱

Below you will find the list of the latest versions of the sample apps. It's recommended to always download the latest builds of the sample apps to accurately test the pull request.

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• FCM: 342.5.0 (28804839)
• APN: 342.5.0 (28804839)