Updates Actions class to enhance type safety and structure

Implements strict types in the Actions class, ensuring better type safety across the codebase.

Refactors property declarations to use static types, improving code clarity and maintainability.

Updates version number to reflect the latest release, ensuring accurate version tracking.

Additionally, improves documentation to provide better context for the various actions defined within the class.

Author: Vítězslav Dvořák

src/AbraFlexi/Actions.php

@@ -1867,8 +1867,8 @@ public function getAllFromAbraFlexi($conditions = null, $indexBy = null)
     /**
      * Get Summary.
      *
-     * @param array<string>        $fields     with summary ability
-     * @param array<string|string> $conditions
+     * @param array<string> $fields     with summary ability
+     * @param array<string> $conditions
      *
      * @throws \InvalidArgumentException - when requested field does not support summmarization
      */