Create readme.md

sites/tvinsider.com/readme.md

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+# tvinsider.com
+
+https://www.tvinsider.com/
+
+### Download the guide
+
+```sh
+npm run grab --- --site=tvinsider.com
+```
+
+### Update channel list
+
+```sh
+npm run channels:parse --- --config=./sites/tvinsider.com/tvinsider.com.config.js --output=./sites/tvinsider.com/tvinsider.com.channels.xml
+```
+
+### Test
+
+```sh
+npm test --- tvinsider.com
+```