Template support for input parameters (#4)

This PR contains the work done to support input parameters for the `create` command of the executable target, and to render content dynamically for the newly-generated project.

Reviewed-on: #4
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Library/Resources/Files/Sources/Test/AppTests

@@ -1,33 +0,0 @@
-import AppLibrary
-import Hummingbird
-import HummingbirdTesting
-import Testing
-
-struct AppTests {
-
-    // MARK: Properties
-
-    private let arguments = TestArguments()
-    private let builder = AppBuilder(name: "App")
-
-    // MARK: Route tests
-    
-    @Test(arguments: ["/"])
-    func routes(_ uri: String) async throws {
-        let app = try await builder(arguments)
-
-        try await app.test(.router) { client in
-            try await client.execute(uri: uri, method: .get) { response in
-                #expect(response.status == .ok)
-                #expect(response.body == .empty)
-            }
-        }
-    }
-
-}
-
-// MARK: ByteBuffer+Constants
-
-private extension ByteBuffer {
-    static let empty = ByteBuffer(string: "")
-}