[HACK][Merchant AI key] Add feature flag & render settings row if eligible

[iamgabrielma]

Description

As part (1) of cleaning up and submitting this HACK week project, this PR adds a feature flag and renders the AI settings row under the app's Menu.

Testing information

• Switch allowMerchantAIAPIKey to true
• Navigate to Menu, observe there's an AI Settings row:
• Tapping on it will render an empty view, and log the hub_menu_ai_settings_tapped event:

🔵 Tracked hub_menu_ai_settings_tapped, properties: [store_id: c5bd46cc-1804-4f7b-badb-bb98c449127f, was_ecommerce_trial: false, plan: , blog_id: -1, is_wpcom_store: false, site_url: https://indiemelon.mystagingwebsite.com]

---

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

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• 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.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on all devices (phone/tablet) and no regressions are added.

[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	pr15404-6060f22
	Version	22.0
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	6060f22
	App Center Build	WooCommerce - Prototype Builds #13410

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

[jaclync]

LGTM 🚀 maybe the HACK Week p2 can be linked in the PR or the linked main GitHub issue?

Switch allowMerchantAIAPIKey to true

How about setting the feature flag to return buildConfig == .localDeveloper || buildConfig == .alpha for easier developement & PR testing?

Tapping on it will render an empty view, and log the hub_menu_ai_settings_tapped event

There's already an event hub_menu_option_tapped with option: ai property logged by default. WDYT about just using this event, with the option value maybe more specific like ai-settings?

[iamgabrielma]

LGTM 🚀 maybe the HACK Week p2 can be linked in the PR or the linked main GitHub issue?

Done!

How about setting the feature flag to return buildConfig == .localDeveloper || buildConfig == .alpha for easier developement & PR testing?

Yeah, I was wary of this because is an empty view for now 😅 . Updated here: 780b945

There's already an event hub_menu_option_tapped with option: ai property logged by default. WDYT about just using this event, with the option value maybe more specific like ai-settings?

Oh, better! Updated: 89f9f4a