[Local Catalog] POS Settings: add POSCatalogSettingsService for Yosemite layer

[jaclync]

Part of WOOMOB-1100

Description

This PR adds the Yosemite layer component, POSCatalogSettingsService, that provides access to local catalog statistics and sync information.

This is a prerequisite of the use case #16144, which enables merchants to view:

• Local catalog size (products and variations count)
• Last incremental sync date
• Last full sync date

Steps to reproduce

This PR does not include the use case, just CI is sufficient. Feel free to review/test it with #16144 if you prefer.

Testing information

I tested the use case in #16144.

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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.

[wpmobilebot]

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

	App Name	WooCommerce iOS Prototype
	Build Number	pr16166-d1f456b
	Version	23.3
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	d1f456b
	Installation URL	5k0qehcfjvmh0

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