Add fortitude linter (#121) #324

Job	Run time
lint	13s
build (ubuntu-latest, fpm, debug, gnu, 12)	56s
build (macos-latest, cmake, debug, gnu, 14)	56s
build (ubuntu-latest, cmake, debug, gnu, 14)	1m 11s
build (macos-latest, meson, debug, gnu, 14)	1m 9s
build (ubuntu-latest, meson, coverage, gnu, 11)	1m 19s
build (ubuntu-latest, meson, debug, gnu, 10)	1m 7s
build (ubuntu-latest, meson, debug, intel, 2021)	3m 23s
build (ubuntu-latest, meson, debug, gnu, 14)	1m 16s
	11m 30s

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