Update Journaux page to increase default results limit and ensure results are sent as strings

- Changed the default results limit from 10 to 30 in the Journaux page.
- Updated the `searchJournaux` method to cast the results parameter to a string to prevent HTTP 400 errors.
- Modified related tests to reflect the new results format and updated expected data structure in API responses.
- Enhanced documentation for the `jnl_list` endpoint to clarify the requirement for the results parameter to be a string.

app/Filament/Pages/Journaux.php

@@ -24,7 +24,7 @@ class Journaux extends Page
 
     public string $select = '';
 
-    public int $results = 10;
+    public int $results = 30;
 
     public string $type = '';
 
@@ -53,7 +53,7 @@ class Journaux extends Page
 
             $params = array_filter([
                 'select' => $this->select,
-                'results' => $this->results,
+                'results' => (string) $this->results,
                 'TYPE' => $this->type,
             ]);