Add `evap-dev-with-lsp` shell (#2407) #3950

Job	Run time
Test Frontend	3m 15s
Build wheel	1m 49s
Test if testdata is up to date	2m 0s
MyPy	1m 32s
Test + Coverage	2m 47s
Formatting	1m 30s
Test Typescript	1m 41s
Backup process	3m 9s
Test (shuffled order)	2m 25s
Linter	2m 8s
Build nix environment on MacOS	3m 27s
Install wheel with system Python	13s
	25m 56s

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