Add a projectArgs CLI argument to hix run #3136

Job	Run time
runghc	25s
cabal	26s
cabal-doExactConfig	29s
maintainer-scripts	10s
multi-target	1m 1s
nix-build	6m 35s
shellFor-hoogle	43s
shellFor-multiple-package	39s
shellFor-not-depends	28s
shellFor-single-package	22s
tests-benchmarks	11s
unit-tests	6s
build-extra-hackages	11s
check-materialization-concurrency	20s
check-path-support	13s
closure-size	6s
docs	39s
haskell-nix-roots-do-not-require-IFDs	22s
hix	1m 4s
hydra-ifdLevel-0-and-1	4m 1s
hydra-ifdLevel-2	12m 41s
hydra-ifdLevel-3	30m 14s
hydra-without-remote-builders-ghc9102	4m 19s
hydra-without-remote-builders-ghc967	2m 35s
plan-extra-hackages	5s
update-docs	6s
hix-cabal	3m 31s
nix-tools	54s
	1h 12m 56s

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