core: frontend: Add disk-usage page #2091

Job	Run time
frontend-tests	2m 1s
python-tests	3m 14s
deploy-docker-images (core, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	10m 41s
deploy-docker-images (bootstrap, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	2m 59s
deploy-raspberry-image	-1s
	18m 54s

Provide feedback