Basic project creation (#3)

This PR contains the work done to create a new *Hummingbird* project with very basic configuration from the _colibri_ executable, just like the project you could create with the [Hummingbird template](https://github.com/hummingbird-project/template) project in Github.

Reviewed-on: #3
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

@@ -0,0 +1,20 @@
+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()
+    }
+
+}

Library/Resources/Files/Sources/App/AppOptions

@@ -0,0 +1,20 @@
+import AppLibrary
+import ArgumentParser
+import Logging
+
+extension App {
+    struct Options: AppArguments, ParsableArguments {
+        
+        // MARK: Properties
+        
+        @Option(name: .shortAndLong)
+        var hostname: String = "127.0.0.1"
+
+        @Option(name: .shortAndLong)
+        var port: Int = 8080
+
+        @Option(name: .shortAndLong)
+        var logLevel: Logger.Level?
+        
+    }
+}