Add support for multiline strings in mapping comments #6045

Job	Run time
Test on node 22 and windows-latest	3m 16s
Test on node 20 and ubuntu-latest	2m 4s
Test on node 22 and macos-latest	1m 36s
Test on node 22 and ubuntu-latest	1m 55s
Test on node 18 and ubuntu-latest	2m 12s
Test on node 24 and ubuntu-latest	1m 42s
Check tsc, lint, and prettier	44s
	13m 29s

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