Add all subprojects and most of the platform code (not yet mapping-ed) #58

Job	Run time
test (ubuntu-latest, 17, mojmap, build)	2m 8s
test (ubuntu-latest, 17, mojmap, genSources)	2m 1s
test (ubuntu-latest, 17, yarn, build)	2m 33s
test (ubuntu-latest, 17, yarn, genSources)	2m 10s
test (macos-latest, 17, mojmap, build)	2m 6s
test (macos-latest, 17, mojmap, genSources)	1m 54s
test (macos-latest, 17, yarn, build)	1m 55s
test (macos-latest, 17, yarn, genSources)	2m 12s
test (windows-latest, 17, mojmap, build)	3m 22s
test (windows-latest, 17, mojmap, genSources)	2m 48s
test (windows-latest, 17, yarn, build)	3m 22s
test (windows-latest, 17, yarn, genSources)	3m 35s
tests-passed	0s
	30m 6s

Provide feedback