feat: Add support for Jinja templates

[philippwaller]

This pull request introduces the capability to use Jinja templates in service data JSON. To achieve this, a significant change was made in how the plugin performs service calls. Specifically, the standard CallServiceCommand function has been replaced with ExecuteScriptCommand. This new command enables the execution of script actions, such as service calls, with the key advantage that templates are evaluated before execution.

Key Advantages:

• Dynamic Customization: Users can dynamically tailor service data based on the context or state of their HomeAssistant environment, allowing for more intelligent and adaptable actions and automations.
• Enhanced Logic Capabilities: The integration of Jinja templates into service data allows for complex logic, opening up possibilities for advanced scenarios.

Should you require any additional details, please do not hesitate to let me know. I look forward to your feedback.

[cgiesche]

Great solution! Thank you very much.