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Add Minimal OpenTelemetry Java Reference Application for Getting Started Guide #1689

Job	Run time
test-declarative-configuration-run	49s
build (windows-latest)	1s
build (macos-latest)	1m 22s
build (ubuntu-latest)	59s
link-check / link-check	7s
required-status-check	2s
	3m 20s

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