Add aggregate functions #1963

Job	Run time
Build MacOS (Nix)	14m 44s
Build aarch64 (Cabal, GHC ${{ matrix.ghc }})	0s
Build Linux (Cabal, GHC 9.0.2)	30m 42s
Build Linux (Cabal, GHC 9.2.4)	19m 43s
Build Linux (Stack)	2m 51s
Build Linux static (Nix)	6m 13s
Build MacOS (Stack)	4m 16s
Get FreeBSD build from CirrusCI	15s
Build Windows (Stack)	8m 40s
Lint & check code style	2m 5s
Test memory (Nix)	5m 25s
Test (Nix)	7m 16s
Test PG 9.6 (Nix)	6m 2s
Test PG 10 (Nix)	8m 1s
Test PG 11 (Nix)	5m 57s
Test PG 12 (Nix)	6m 24s
Test PG 13 (Nix)	8m 16s
Test PG 14 (Nix)	9m 42s
Test PG 15 (Nix)	6m 22s
Prepare release	0s
Release on Docker Hub	0s
Release on GitHub	0s
Release Arm Builds on Docker Hub	0s
Remove copied files from server	0s
	2h 32m 54s

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