[espmilighthub] Initial contribution (#9218)

* espmilighthub inital

Signed-off-by: Matthew Skinner <matt@pcmus.com>

Co-authored-by: Fabian Wolter <github@fabian-wolter.de>
Co-authored-by: Connor Petty <mistercpp2000+gitsignoff@gmail.com>

bundles/pom.xml

@@ -195,6 +195,7 @@
     <module>org.openhab.binding.monopriceaudio</module>
     <module>org.openhab.binding.mpd</module>
     <module>org.openhab.binding.mqtt</module>
+    <module>org.openhab.binding.mqtt.espmilighthub</module>
     <module>org.openhab.binding.mqtt.generic</module>
     <module>org.openhab.binding.mqtt.homeassistant</module>
     <module>org.openhab.binding.mqtt.homie</module>