Moved enums into CloudState message

The enum has been changed to CloudStateLevel and moved into a more open meaning message of CloudState. This can easily be expanded in the future with more detailed information

Signed-off-by: Markus Waldmann <Markus.Waldmann@stud.hs-kempten.de>

Author: Markus Waldmann

osi_environment.proto

@@ -378,7 +378,7 @@ message EnvironmentalConditions
     // [2] https://de.wikipedia.org/wiki/Bewölkung
     // [3] https://www.dwd.de/DE/service/lexikon/Functions/glossar.html?lv2=100932&lv3=101016
     //
-    enum CloudState
+    enum CloudStateLevel
     {
         // Cloud State is unknown (must not be used in ground truth).
         //
@@ -448,4 +448,15 @@ message EnvironmentalConditions
         //
         optional double intensity = 3;
     }
+
+
+    //
+    // \brief Specification of the cloud states
+    //
+    // \note within this message there is the cloud state level
+    //
+    message CloudState
+    {
+        optional CloudStateLevel cloud_state_level = 1;
+    }
 }