Support for LD2450 Radar Installation Angle

**Describe the problem you have/What new integration you would like**

I would like to request adding support for specifying the installation angle of the LD2450 radar sensor relative to the wall or room corner. This feature would enable proper configuration of virtual detection zones, accounting for the radar's angled positioning, similar to the approach implemented in this project:
[ESP32_LD2450 Example](https://github.com/53l3cu5/ESP32_LD2450/tree/6f24e9237b4b1b7a889ed811f53a5d6a36f8d362)

**Please describe your use case for this integration and alternatives you've tried:**

Currently, it is not possible to set an angle for the radar relative to the wall. As a result, if the sensor can only be installed in a corner, accurately configuring the virtual rectangular detection zones is impossible, as these zones cannot be rotated relative to the radar's position. This limitation forces either an incorrect (aesthetically displeasing) radar installation or overly generalized and ineffective detection zones. Both of these alternatives significantly reduce the usefulness and precision of automations based on the radar's detection capabilities.

Having the ability to set an installation angle would resolve this issue by allowing correct zone configuration, substantially improving the effectiveness and precision of home automation scenarios.

**Additional context**

A good reference implementation of angled positioning handling can be found here:
[ESP32_LD2450 Example - Angle Handling](https://github.com/53l3cu5/ESP32_LD2450/blob/6f24e9237b4b1b7a889ed811f53a5d6a36f8d362/esp-presence-2450.yaml#L1375)