Define absolute paths for various includes

- Fix errors running local tests in IDE

include/items.php

@@ -24,7 +24,8 @@ use Friendica\Util\ParseUrl;
 use Friendica\Util\Strings;
 use Friendica\Util\Temporal;
 
-require_once 'mod/share.php';
+require_once __DIR__ . '/../mod/share.php';
+
 function add_page_info_data(array $data, $no_photos = false)
 {
 	Hook::callAll('page_info_data', $data);

src/BaseObject.php

@@ -4,7 +4,7 @@
  */
 namespace Friendica;
 
-require_once 'boot.php';
+require_once __DIR__ . '/../boot.php';
 
 use Friendica\Network\HTTPException\InternalServerErrorException;
 

src/Render/FriendicaSmartyEngine.php

@@ -17,7 +17,7 @@ class FriendicaSmartyEngine implements ITemplateEngine
 
 	public function __construct()
 	{
-		if (!is_writable('view/smarty3/')) {
+		if (!is_writable(__DIR__ . '/../../view/smarty3/')) {
 			echo "<b>ERROR:</b> folder <tt>view/smarty3/</tt> must be writable by webserver.";
 			exit();
 		}