Restore POS strings for localization

[iamgabrielma]

Description

After the POS modularization, we have lost the localized strings in POS due to the module path being missing from one of the code freeze steps, which grabs the strings from the iOS codebase and sends them to GlotPress.

Since POS is currently set mostly for en language users, we decided to take the path of re-adding the path in 22.7 and restoring localized strings for next release (23.8) Ref: p1763729754474429?thread_ts=1763708437.689109&cid=CC7L49W13-slack-CC7L49W13

Changes:

• Add Modules/Sources/PointOfSale/ path to generate_strings_file_for_glotpress lane
• Restored POS string-keys in en.lproj/Localizable.strings

Test Steps

• Copypaste one or several of the restored pos. or pointOfSale. key-values from en.lproj/Localizable.strings to a different language (i.e: es.lproj/Localizable.strings. Example:

/* Hint to add products to the Cart when this is empty. */
"pos.cartView.addItemsToCartOrScanHint" = "Tap on a product to \n add it to the cart, or ";

• Change it's value to something else
• Run the app in that language and observe the new value is used in the app

[dangermattic]

	2 Warnings
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.
⚠️	This PR is assigned to the milestone 23.7 ❄️. The due date for this milestone has already passed. Please assign it to a milestone with a later deadline or check whether the release for this milestone has already been finished.

Generated by 🚫 Danger

[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	pr16384-92e473b
	Version	23.7
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	92e473b
	Installation URL	3bv7j66urpqtg

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