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/Conversation/Community.php

@@ -49,7 +49,7 @@ class Community extends BaseModule
 	protected static $max_id;
 	protected static $item_id;
 
-	public function content(): string
+	protected function content(array $request = []): string
 	{
 		$this->parseRequest();
 

src/Module/Conversation/Network.php

@@ -57,7 +57,7 @@ class Network extends BaseModule
 	/** @var string */
 	protected static $order;
 
-	public function content(): string
+	protected function content(array $request = []): string
 	{
 		if (!local_user()) {
 			return Login::form();