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/Update/Community.php

@@ -33,7 +33,7 @@ use Friendica\Module\Conversation\Community as CommunityModule;
  */
 class Community extends CommunityModule
 {
-	public function rawContent()
+	protected function rawContent(array $request = [])
 	{
 		$this->parseRequest();
 

src/Module/Update/Network.php

@@ -9,7 +9,7 @@ use Friendica\Module\Conversation\Network as NetworkModule;
 
 class Network extends NetworkModule
 {
-	public function rawContent()
+	protected function rawContent(array $request = [])
 	{
 		if (!isset($_GET['p']) || !isset($_GET['item'])) {
 			exit();

src/Module/Update/Profile.php

@@ -35,7 +35,7 @@ use Friendica\Util\DateTimeFormat;
 
 class Profile extends BaseModule
 {
-	public function rawContent()
+	protected function rawContent(array $request = [])
 	{
 		$a = DI::app();
 
@@ -93,7 +93,7 @@ class Profile extends BaseModule
 		);
 
 		if (!DBA::isResult($items_stmt)) {
-			return '';
+			return;
 		}
 
 		// Set a time stamp for this page. We will make use of it when we