[epsonprojector] Always set ready=true on disconnect and improve documentation (#10079)

* Always set ready on disconnect and improve documentation
* improve documentation

Signed-off-by: Michael Lobstein <michael.lobstein@gmail.com>

bundles/org.openhab.binding.epsonprojector/src/main/java/org/openhab/binding/epsonprojector/internal/EpsonProjectorDevice.java

@@ -206,11 +206,11 @@ public class EpsonProjectorDevice {
     public void disconnect() throws EpsonProjectorException {
         connection.disconnect();
         connected = false;
+        ready = true;
         ScheduledFuture<?> timeoutJob = this.timeoutJob;
         if (timeoutJob != null) {
             timeoutJob.cancel(true);
             this.timeoutJob = null;
-            ready = true;
         }
     }