Add *.py.script files to distributions (#3074)

MANIFEST.in

@@ -4,4 +4,5 @@ include requirements.txt
 include esphome/dashboard/templates/*.html
 recursive-include esphome/dashboard/static *.ico *.js *.css *.woff* LICENSE
 recursive-include esphome *.cpp *.h *.tcc
+recursive-include esphome *.py.script
 recursive-include esphome LICENSE.txt