Add first take on porting over licensing server support from ubuntu

dist/platforms/mac/steps/activate.sh

@@ -6,6 +6,22 @@ pushd "$ACTIVATE_LICENSE_PATH"
 
 echo "Requesting activation"
 
+if [[ -n "$UNITY_LICENSING_SERVER" ]]; then
+   #
+    # Custom Unity License Server
+    #
+    echo "Adding licensing server config"
+
+   /Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/Frameworks/UnityLicensingClient.app/Contents/MacOS/Unity.Licensing.Client --acquire-floating > license.txt #is this accessible in a env variable?
+    PARSEDFILE=$(grep -oP '\".*?\"' < license.txt | tr -d '"')
+    export FLOATING_LICENSE
+    FLOATING_LICENSE=$(sed -n 2p <<< "$PARSEDFILE")
+    FLOATING_LICENSE_TIMEOUT=$(sed -n 4p <<< "$PARSEDFILE")
+
+    echo "Acquired floating license: \"$FLOATING_LICENSE\" with timeout $FLOATING_LICENSE_TIMEOUT"
+    # Store the exit code from the verify command
+    UNITY_EXIT_CODE=$?
+else
   # Activate license
   /Applications/Unity/Hub/Editor/$UNITY_VERSION/Unity.app/Contents/MacOS/Unity \
     -logFile - \
@@ -19,7 +35,7 @@ echo "Requesting activation"
 
   # Store the exit code from the verify command
   UNITY_EXIT_CODE=$?
-
+fi
 #
 # Display information about the result
 #