Use nix to manage development environment #11505

Job	Run time
Linters	35s
Ruby 3.2 - Rails 8.0 - RubyGems 3.6.2	20m 58s
Ruby 4.0 - Rails 8.0 - RubyGems 3.6.2	22m 22s
Ruby 3.2 - Rails current - RubyGems 3.6.2	21m 10s
Ruby 4.0 - Rails current - RubyGems 3.6.2	22m 36s
Ruby head - Rails 8.0 - RubyGems 3.6.2	25m 39s
Ruby 3.4 - Rails current - RubyGems 3.6.2	23m 35s
Ruby 3.3 - Rails 8.0 - RubyGems 3.6.2	21m 34s
Ruby 4.0 - Rails main - RubyGems 3.6.2	21m 20s
Ruby 3.4 - Rails main - RubyGems 3.6.2	21m 5s
Ruby 3.3 - Rails main - RubyGems 3.6.2	25m 42s
Ruby 3.3 - Rails current - RubyGems 3.6.2	24m 55s
Ruby 3.4 - Rails 8.0 - RubyGems 3.6.2	20m 0s
Ruby head - Rails current - RubyGems 3.6.2	25m 12s
Ruby head - Rails main - RubyGems 3.6.2	21m 50s
Build (matrix)	4s
	5h 18m 37s

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