feat: clean up and starting documentation

tests/Helpers/ConfigConditionsMock.php

@@ -4,6 +4,5 @@
     'format_numbers' => true,
     'decimals' => 2,
     'dec_point' => '.',
-    'thousands_sep' => ',',
-    'use_cents' => false,
+    'driver' => 'session',
 ];

tests/Helpers/ConfigMock.php

@@ -4,4 +4,5 @@
     'format_numbers' => true,
     'decimals' => 2,
     'round_mode' => 'up',
+    'driver' => 'session',
 ];

tests/Helpers/ConfigMockOtherFormat.php

@@ -4,5 +4,5 @@
     'format_numbers' => false,
     'decimals' => 3,
     'dec_point' => ',',
-    'thousands_sep' => '.',
+    'driver' => 'session',
 ];