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/App/App

@@ -1,20 +0,0 @@
-import AppLibrary
-import ArgumentParser
-
-@main
-struct App: AsyncParsableCommand {
-    
-    // MARK: Properties
-
-    @OptionGroup var options: Options
-    
-    // MARK: Functions
-
-    mutating func run() async throws {
-        let builder = AppBuilder(name: "App")
-        let app = try await builder(options)
-
-        try await app.runService()
-    }
-
-}