Initialize nix setup for the repo #2291

Job	Run time
Docker CLI tests (ubuntu-latest)	6m 46s
Maven tests (17)	4m 48s
bazel_aspect	4m 41s
check	7m 18s
semanticdb-kotlinc	3m 46s
Maven tests (11)	4m 59s
Tests (ubuntu-latest, 21)	8m 56s
bazel	2m 38s
Maven tests (21)	4m 46s
Tests (ubuntu-latest, 17)	14m 16s
Tests (ubuntu-latest, 11)	17m 7s
	1h 20m 1s

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