[feature] Product/Restock alerts - should have also `PreStock` mode

[dgtlmoon]

Would be really nice to have more modes detected for changes with the restock monitor

In Stock , Out of Stock, and in this case PreSale

There is also the "text" In Kürze lieferbar to be added to a different list of JS texts

So for example

and we have

    <script type="application/ld+json">
{
    "@context": "https://schema.org/",
    "@type": "Product",
    "name": "ASUS ROG Astral GeForce RTX 5090 OC 32GB",
    "image": "https://website.de/422x390/products/2149471",
    "url": "https://website.de/produkt/959842/asus-rog-astral-geforce-rtx-5090-oc-32gb.html",
    "brand": {
        "@type": "Brand",
        "name": "ASUS"
    },
    "description": "Hinweis: Verwende nur die mitgelieferten Kabel",
    "sku": "959842",
    "offers": {
        "@type": "Offer",
        "priceCurrency": "EUR",
        "price": "2998",
        "availability": "https://schema.org/PreSale",
        "itemCondition": "https://schema.org/NewCondition"
            }}
</script>

[dgtlmoon]

Let's go ALL IN with all the supported statuses, it would be much more accurate

Value	Description
https://schema.org/InStock	The item is in stock.
https://schema.org/OutOfStock	The item is out of stock.
https://schema.org/PreOrder	The item is available for preorder.
https://schema.org/PreSale	The item is available for presale (typically earlier than preorder).
https://schema.org/Discontinued	The item is no longer available.
https://schema.org/LimitedAvailability	The item has limited availability.
https://schema.org/SoldOut	The item has been sold out.
https://schema.org/OnlineOnly	The item is available only online.
https://schema.org/InStoreOnly	The item is available only in physical stores.
https://schema.org/BackOrder	The item is out of stock but can be ordered and will be shipped when available.

• [Schema.org - Offer](https://schema.org/Offer)
• [Enumeration: ItemAvailability](https://schema.org/ItemAvailability)