chore: add Phoenix CoreComponents, upgrade to Phoenix 1.7 #4808

Job	Run time
file_changes	5s
Build Docker image	3m 52s
Build application and assets	2m 50s
Linting / Elixir	2m 9s
Formatting / Elixir	29s
Formatting / JavaScript & TypeScript	38s
Linting / TypeScript	48s
Unit tests / JavaScript / Mocha	36s
Linting / JavaScript	24s
Unit tests / JavaScript & TypeScript / Jest	2m 26s
Linting / CSS	25s
Type checks / Elixir	2m 26s
Type checks / TypeScript	32s
Unit tests / Elixir / mix coveralls.html	1m 1s
	18m 41s

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