Use chatkit-python WidgetTemplate for cat-lounge and mero-map #80

Job	Run time
Python checks (examples/cat-lounge/backend)	37s
Node build (examples/news-guide/frontend)	19s
Node build (examples/customer-support/frontend)	15s
Python checks (examples/news-guide/backend)	34s
Node build (examples/cat-lounge/frontend)	22s
Python checks (examples/customer-support/backend)	33s
	2m 40s

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