Restructured the folder structure of the executable target.

Package.swift

@@ -33,15 +33,15 @@ let package = Package(
                 ),
                 .target(name: "ColibriLibrary")
             ],
-            path: "Sources/Executable",
-            resources: [
-                .copy("Resources/")
-            ]
+            path: "Executable"
         ),
         .target(
             name: "ColibriLibrary",
             dependencies: [],
-            path: "Sources/Library"
+            path: "Sources/Library",
+            resources: [
+                .copy("Resources/Files/LICENSE")
+            ]
         ),
         .testTarget(
             name: "ColibriTests",