Upgrade code to php 8.1 (#6748)

* revert
Fix code indentation
Fix code

Upgrade code to php 8.1

* fix remarques

* code review

* code review

* code review

* Apply suggestions from code review

* code review

* Fixes

* Many remainging updates of array syntax

* Lost case 'reading-list'

* Uneeded PHPDoc

---------

Co-authored-by: Luc Sanchez <l.sanchez-prestataire@alptis.fr>
Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>

app/Models/StatsDAOSQLite.php

@@ -32,19 +32,12 @@ SQL;
 			return [];
 		}
 
-		switch ($period) {
-			case '%H':
-				$periodMax = 24;
-				break;
-			case '%w':
-				$periodMax = 7;
-				break;
-			case '%m':
-				$periodMax = 12;
-				break;
-			default:
-				$periodMax = 30;
-		}
+		$periodMax = match ($period) {
+			'%H' => 24,
+			'%w' => 7,
+			'%m' => 12,
+			default => 30,
+		};
 
 		$repartition = array_fill(0, $periodMax, 0);
 		foreach ($res as $value) {