Add DesignResourcesKit to SyncUI (#2147)

Task/Issue URL: https://app.asana.com/0/414235014887631/1205930555428985/f
Tech Design URL:
CC: @ayoy

Description:

This PR adds DesignResourcesKit as a dependency of SyncUI. SyncUI already imports it in a number of places, but doesn't have it declared as a dependency.

LocalPackages/SyncUI/Package.swift

@@ -31,13 +31,15 @@ let package = Package(
             targets: ["SyncUI"])
     ],
     dependencies: [
-        .package(path: "../DuckUI")
+        .package(path: "../DuckUI"),
+        .package(url: "https://github.com/duckduckgo/DesignResourcesKit", exact: "2.0.0")
     ],
     targets: [
         .target(
             name: "SyncUI",
             dependencies: [
-                .product(name: "DuckUI", package: "DuckUI")
+                .product(name: "DuckUI", package: "DuckUI"),
+                "DesignResourcesKit"
             ])
     ]
 )