feat(SlimFaasPlanetSaver): add manual TypeScript File Definition #811

Job	Run time
Unit Tests	1m 37s
SonarCloud	4m 45s
tags	5s
build_slimfaas_planet_saver	15s
build_fibonacci / build	54s
build_slimfaas / build	2m 59s
build_fibonacci_webapp / build	2m 34s
	13m 9s

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