kristofer/JavaExercism: lots of exercises in java... from https://github.com/exercism/java

lots of exercises in java... from https://github.com/exercism/java

Stuart Kent 10b9dd96a6 Move exercise template to root dir See https://github.com/exercism/xkotlin/pull/61 for context.		9 lat temu
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example/java	Move exercise template to root dir	9 lat temu
main/java	Move exercise template to root dir	9 lat temu
test/java	Move exercise template to root dir	9 lat temu