feat: add device group subscription #23

Job	Run time
codeql / Analyze (javascript)	1m 13s
warmup-cache / warmup-cache	22s
docker-build / Build Docker image	58s
types / check-types	34s
coverage / coverage-test	58s
linting / check-linting	26s
formatter / check-format	29s
translations / check-translations	25s
build / build	42s
	6m 7s

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