swiftsync: Add hintfile reading #15

Job	Run time
determine runners	4s
macOS native, no depends, sqlite only, gui	23m 34s
macOS native, fuzz	11m 49s
Windows native, VS 2022	55m 10s
Windows native, fuzz, VS 2022	37m 41s
test each commit	-1s
lint	4m 53s
Linux->Windows cross, no tests	56m 30s
32 bit ARM, unit tests, no functional tests	38m 50s
ASan + LSan + UBSan + integer, no depends, USDT	1h 19m 3s
No wallet, libbitcoinkernel	55m 52s
fuzzer,address,undefined,integer, no depends	2h 14m 28s
macOS-cross to x86_64	45m 6s
macOS-cross to arm64	51m 43s
previous releases, depends DEBUG	54m 29s
Valgrind, fuzz	3h 6m 14s
Alpine (musl), depends, gui	1h 33m 6s
no IPC, i686, DEBUG	1h 18m 27s
MSan, depends	1h 20m 16s
tidy	57m 21s
TSan, depends, no gui	1h 3m 9s
MSan, fuzz	1h 44m 35s
Windows, test cross-built	42m 56s
	22h 35m 15s

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