Added the catalogue models and seed to support phase 1 of the POC prototype in the Persistence package.

Packages/Persistence/Sources/Public/Models/Shop.swift

@@ -0,0 +1,65 @@
+/// A `Sendable` snapshot of a seller's shop.
+public struct Shop: Sendable, Equatable {
+
+    // MARK: Properties
+
+    /// The shop's URL slug.
+    public let slug: String
+    /// The shop's name.
+    public let name: String
+    /// The city the shop ships from.
+    public let city: String
+    /// The ISO 3166-1 alpha-2 code of the country the shop ships from.
+    public let country: String
+    /// The year the shop started selling on the site.
+    public let sinceYear: Int
+    /// Whether the shop's identity has been verified.
+    public let isVerified: Bool
+    /// The shop's average rating, out of five.
+    public let rating: Double
+    /// The number of rated sales behind ``rating``.
+    public let ratedSales: Int
+    /// The number of items the shop has sold.
+    public let soldCount: Int
+    /// The shop's handling time, in business days.
+    public let handlingDays: Int
+    /// Where and how the shop ships.
+    public let shipsNote: String
+    /// The shop's returns policy, in a few words.
+    public let returnsNote: String
+    /// The shop's description of itself.
+    public let about: String
+
+    // MARK: Initializers
+
+    public init(
+        slug: String,
+        name: String,
+        city: String,
+        country: String,
+        sinceYear: Int,
+        isVerified: Bool,
+        rating: Double,
+        ratedSales: Int,
+        soldCount: Int,
+        handlingDays: Int,
+        shipsNote: String,
+        returnsNote: String,
+        about: String
+    ) {
+        self.slug = slug
+        self.name = name
+        self.city = city
+        self.country = country
+        self.sinceYear = sinceYear
+        self.isVerified = isVerified
+        self.rating = rating
+        self.ratedSales = ratedSales
+        self.soldCount = soldCount
+        self.handlingDays = handlingDays
+        self.shipsNote = shipsNote
+        self.returnsNote = returnsNote
+        self.about = about
+    }
+
+}