Add LoggingThread#getState method

base/src/main/java/de/staropensource/sosengine/base/logging/LoggingThread.java

@@ -131,4 +131,15 @@ public class LoggingThread {
         } else
             loggingThread.start();
     }
+
+    /**
+     * Returns the {@link Thread.State} of the logging thread.
+     *
+     * @return logging thread state
+     * @since v1-alpha4
+     * @see Thread.State
+     */
+    public static @NotNull Thread.State getState() {
+        return loggingThread.getState();
+    }
 }