feat: add internal BigSegmentsBuilder + config struct (#541) #1928

Job	Run time
build-test-server-windows-curl	19m 40s
build-test-server-curl	8m 40s
contract-tests	3m 59s
build-test-server	8m 36s
contract-tests-curl	4m 37s
build-test-server-mac-curl	5m 18s
build-test-server-mac	7m 48s
build-test-server-windows	20m 34s
	1h 19m 12s

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