incremental: introduce IncrementalGraph class to manage tree of subsequent results #1875

Job	Run time
Diff content of NPM package	1m 40s
Security check of added dependencies	6s
ci / Build 'denoDist' artifact	58s
ci / Build 'npmDist' artifact	1m 6s
ci / Build website	1m 39s
ci / Check for commonly ignored files	4s
ci / Check health of package-lock.json file	32s
ci / Run CodeQL security scan	1m 28s
ci / Run fuzzing tests	44s
ci / Run integration tests	1m 35s
ci / Lint source files	1m 13s
ci / Run tests on Node v16	52s
ci / Run tests on Node v18	47s
ci / Run tests on Node v19	45s
	13m 29s

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