Make BaseModule a real entity

- Add all dependencies, necessary to run the content (baseUrl, Arguments)
- Encapsulate all POST/GET/DELETE/PATCH/PUT methods as protected methods inside the BaseModule
- Return Module content ONLY per `BaseModule::run()` (including the Hook logic there as well)

src/Module/RobotsTxt.php

@@ -28,7 +28,7 @@ use Friendica\BaseModule;
  */
 class RobotsTxt extends BaseModule
 {
-	public function rawContent()
+	protected function rawContent(array $request = [])
 	{
 		$allDisalloweds = [
 			'/settings/',