refactor: De-umbrella this application #3660

Job	Run time
File changes / List changed files	11s
Linting / Elixir	1m 34s
Linting / TypeScript	39s
Build app (or restore from cache)	2m 35s
Formatting / Elixir	27s
Unit tests / JavaScript / Mocha	55s
Formatting / JavaScript & TypeScript	46s
Unit tests / JavaScript & TypeScript / Jest	2m 14s
Linting / JavaScript	29s
Linting / CSS	26s
Type checks / Elixir	3m 9s
Type checks / TypeScript	43s
Integration tests / Elixir	1m 17s
Unit tests / Elixir / --exclude wallaby --cover	3m 47s
	19m 12s

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