Move all WordPressAuthenticator sources into this repo

[mokagio]

Description

Removes the WordPressAuthenticator-iOS and WordPressKit-iOS dependencies by folding both into the codebase. See rationale in #14329.

I implemented this using one framework target in the WooCommerce project, which is then linked in the WooCommerce iOS app. I had initially tried having the code in a dedicated project, like the other frameworks like Yosemite, Storage, Networking, etc. do, but I run into some compilation issues and decided to move to the target setup. For what is worth, that is the same approach that WordPress and Jetpack use.

We could consider extracting into a project in the future, once most of the unused code (and presumably some additional dependency) has been removed.

Alternatively, we could move the whole code into the WooCommerce target itself. However I wouldn't recommend this because that target is already quite big and with tests that take a long time to run.

There is of course a lot of new code in this PR. As you can see from the commit history, I spent some time deleting unused code, but I'm nowhere near done. I decided to draw a line in the sand and ask for review now, though, and continue chipping away at the unused afterwards. Otherwise, this will become stale and we'll risk more work happening in the libraries.

Steps to reproduce

N.A.

Testing information

If CI is green and we can log into the app, then I'd call the operation successful.

Screenshots

N.A.

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• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary. – N.A.

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• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
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[dangermattic]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

Generated by 🚫 Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce iOS by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce iOS
	Build Number	pr14779-56e20a4
	Version	21.4
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	56e20a4
	App Center Build	WooCommerce - Prototype Builds #12594

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[mokagio]

Comes from WordPressKit https://github.com/wordpress-mobile/WordPressKit-iOS/blob/40a984ddc1f6775052f81b82565c1fb01d8198c5/WordPressKit.podspec#L30-L32

[mokagio]

Already set in the project but not update here and ignored because some target overrode it instead of inheriting (by deleting the entry at the target level)

[hichamboushaba]

Hey @mokagio, when can we expect this PR to be ready for review and merged? We have a project that touches on this code (pe5sF9-3mV-p2), and we are delaying it until this PR is merged to avoid any more unwanted conflicts.

[mokagio]

@hichamboushaba sorry you had to write that. Bad timing on my end... I had planned and started to work on this today p1737328507842779-slack, but something else came up, p1737344967048199-slack, so I only got to this now.

Anyway, this is now ready to review and I hope it'll get looked at soon. Feel free to leave your review, too, much appreciated.

[wzieba]

hi @mokagio 👋 have you considered using git filter-repo to preserve the git history of the WordPressAuthenticator files? We've been using this strategy for a few Android projects now (Media, FluxC, Login) with success.