chore: extract classes needed to be shared

[Shahroz16]

Third draft PR for [CDP] iOS Refactor: Base module#11645

Problem statement:

Current DIGraph is bound by sdkConfig which is bound by SDK initialization
Push and in-app should be able to access classes without being dependent on SDK being initialized
Push and in-app should be able to access classes that are not bound by the tracking module initialing the SDK
Removed the dependency on SdkInitializedUtil We are holding a strong reference to digraph just for this purpose

    // The 1 place that DiGraph is strongly stored in memory for the SDK.
    // Exposed for `SdkInitializedUtil`. Not recommended to use this property directly.
    var diGraph: DIGraph?

Benefits:

Breaking sdkConfig to not be sandboxed and to be to utilize digraph would be a scope creep and a lot bigger change and this separate class removes that.
We have now added a concept of scoped graphs, previously everything was bound to sdkConfig scope hence the issue. Now we have a digraph that is not bound to anything, and we have a graph bound to sdkConfig and a template to add more graphs if needed for each module for the classes in that module
Events/Journeys needs to be shared instance among all modules to make sure multiple instances aren't created and events are not missed.
This approach makes sure that even if end up deciding we are going to keep tracking code (separate ticket), digraph or any of the older implementations doesn't break

We aren't modifying the DiGraph but rather adding another one, independent of sdkConfig that push and in-app are utilizing.

[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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• APN-UIKit: Build failed. See CI job logs to determine the issue and try re-building.
• CocoaPods-FCM: shahroz/native-digraph (1701081869)

[codecov]

Codecov Report

Attention: 105 lines in your changes are missing coverage. Please review.

Comparison is base (624312f) 58.17% compared to head (db961f3) 57.04%.

❗ Current head db961f3 differs from pull request most recent head adc9f79. Consider uploading reports for the commit adc9f79 to get more accurate results

Files	Patch %	Lines
Sources/Common/Util/KeyValueStorage.swift	0.00%	49 Missing ⚠️
Sources/Common/Util/Log.swift	0.00%	29 Missing ⚠️
Sources/Common/Store/GlobalDataStore.swift	0.00%	24 Missing ⚠️
Sources/Common/DIGraphShared.swift	0.00%	2 Missing ⚠️
Sources/Common/DIManager.swift	95.45%	1 Missing ⚠️

Additional details and impacted files

@@                         Coverage Diff                          @@
##           shahroz/cdp-native-refactor-base     #408      +/-   ##
====================================================================
- Coverage                             58.17%   57.04%   -1.13%     
====================================================================
  Files                                   123      125       +2     
  Lines                                  4727     4831     +104     
====================================================================
+ Hits                                   2750     2756       +6     
- Misses                                 1977     2075      +98     

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[levibostian]

I have some questions regarding this PR. I'll ask in Slack.

[mrehan27]

Looks good to me. I can see this has been resolved in Slack, so looks like we are good merging this.