refactor: ./tests (#2649)

* refactor: ./tests

* test: consolidate testsuites

* refactor: move config setup into rssbridge.php

Makes it easier to unit test.

* lint

index.php

@@ -1,11 +1,7 @@
 <?php
+
 require_once __DIR__ . '/lib/rssbridge.php';
 
-Configuration::verifyInstallation();
-Configuration::loadConfiguration();
-
-Authentication::showPromptIfNeeded();
-
 /*
 Move the CLI arguments to the $_GET array, in order to be able to use
 rss-bridge from the command line