feat: initial release of Developer Preview of DynamoDB Mapper for Kotlin #3182

Job	Run time
all-platforms (ubuntu-latest)	10m 49s
jvm (8)	4m 24s
all-platforms (macos-latest)	18m 14s
jvm (11)	4m 26s
all-platforms (windows-latest)	22m 9s
jvm (17)	4m 19s
jvm (21)	6m 38s
	1h 10m 59s

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