Create readme.md

sites/antennaeurope.gr/readme.md

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+# antennaeurope.gr
+
+https://www.antennaeurope.gr/el/tvguide.html
+
+### Download the guide
+
+```sh
+npm run grab --- --site=antennaeurope.gr
+```
+
+### Test
+
+```sh
+npm test --- antennaeurope.gr
+```