[Woo POS] Favourite products in POS

[joshheald]

Closes: #

Description

This is a Proof of Concept for using favourites to filter the POS product list, to have custom product lists available in POS. It's only a lightweight, temporary approach, but it might help some merchants if we can get it out really soon.

We already store a list of favourited product IDs in the local storage. This PR adds an option to use that list as a filter on the Products List requests when the toggle is on, and to toggle the favourite state within POS.

It could also work with search, but I've not added it there yet.

Steps to reproduce

Testing information

Screenshots

https://github.com/user-attachments/assets/4bc69dbb-fe3b-44e3-95db-8f9c74c67a71

---

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

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[dangermattic]

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	App Name	WooCommerce iOS Prototype
	Build Number	29410
	Version	PR #15533
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	c320e0f058889dd9f2d8e8be2fc1e09cf30e4bb5
	Installation URL	00gp7d5d46to0

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