[Library] Filter library (#7)

This PR contains the work done to create the `Filter` library into the **Libraries** package, and moved the `FilterWordsUseCase` use case to it from the `Foundation` library.

Reviewed-on: rock-n-code/app-reviews#7
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Libraries/Package.swift

@@ -12,6 +12,7 @@ let package = Package(
             name: .Product.name.kit,
             targets: [
                 .Target.feed.kit,
+                .Target.filter.kit,
                 .Target.foundation.kit,
                 .Target.iTunes.kit,
             ]
@@ -25,6 +26,13 @@ let package = Package(
             ],
             path: "Feed/Kit"
         ),
+        .target(
+            name: .Target.filter.kit,
+            dependencies: [
+                .byName(name: .Target.foundation.kit),
+            ],
+            path: "Filter/Kit"
+        ),
         .target(
             name: .Target.foundation.kit,
             path: "Foundation/Kit"
@@ -44,6 +52,13 @@ let package = Package(
             ],
             path: "Feed/Test"
         ),
+        .testTarget(
+            name: .Target.filter.test,
+            dependencies: [
+                .byName(name: .Target.filter.kit),
+            ],
+            path: "Filter/Test"
+        ),
         .testTarget(
             name: .Target.foundation.test,
             dependencies: [
@@ -73,6 +88,7 @@ private extension String {
     
     enum Target {
         static let feed = "\(String.Product.name)Feed"
+        static let filter = "\(String.Product.name)Filter"
         static let foundation = "\(String.Product.name)Foundation"
         static let iTunes = "\(String.Product.name)iTunes"
     }