Adding the icon for source build

Issue-Ref: 4310
Issue-Url: af3#4310


Signed-off-by: Konstantin Blaschke <blaschke@fortiss.org>

org.fortiss.tooling.ext.quality.ui/build.properties

 # (c) 2023 fortiss GmbH
 bin.includes = .,\
                META-INF/,\
-               plugin.xml
+               plugin.xml,\
+               icons/
 source.. = src/,\
            res/
-output.. = build/
\ No newline at end of file
+output.. = build/
+src.includes = icons/