add ATTENUATION_RADIUS_MODE constant with its 2 available options of automatic or explicit

Signed-off-by: jromnoa <80134229+jromnoa@users.noreply.github.com>

AutomatedTesting/Gem/PythonTests/Atom/atom_utils/atom_constants.py

@@ -18,6 +18,12 @@ LIGHT_TYPES = {
     'simple_spot': 7,
 }
 
+# Attenuation Radius Mode options for the Light component.
+ATTENUATION_RADIUS_MODE = {
+    'automatic': 1,
+    'explicit': 0,
+}
+
 
 class AtomComponentProperties:
     """
@@ -249,7 +255,14 @@ class AtomComponentProperties:
     def light(property: str = 'name') -> str:
         """
         Light component properties.
+          - 'Attenuation Radius Mode' controls whether the attenuation radius is calculated automatically or explicitly.
+          - 'Color' the RGB value to set for the color of the light.
+          - 'Enable shadow' toggle for enabling shadows for the light.
+          - 'Enable shutters' toggle for enabling shutters for the light.
+          - 'Inner angle' inner angle value for the shutters (in degrees)
+          - 'Intensity' the intensity of the light in the set photometric unit (float with no ceiling).
           - 'Light type' from atom_constants.py LIGHT_TYPES
+          - 'Outer angle' outer angle value for the shutters (in degrees)
         :param property: From the last element of the property tree path. Default 'name' for component name string.
         :return: Full property path OR component name if no property specified.
         """