feat(examples): add simplest "counter" realm (#2815) #7611

Job	Run time
Run Main (autocounterd) / Go Build / generated	9s
Run Main (autocounterd) / Go Linter / lint	31s
Run Main (autocounterd) / Go Test / test	32s
Run Main (docker-integration) / Go Build / generated	5s
Run Main (docker-integration) / Go Linter / lint	7s
Run Main (docker-integration) / Go Test / test	17s
Run Main (genproto) / Go Build / generated	9s
Run Main (genproto) / Go Linter / lint	31s
Run Main (genproto) / Go Test / test	37s
Run Main (genstd) / Go Build / generated	7s
Run Main (genstd) / Go Linter / lint	23s
Run Main (genstd) / Go Test / test	27s
Run Main (goscan) / Go Build / generated	8s
Run Main (goscan) / Go Linter / lint	22s
Run Main (goscan) / Go Test / test	18s
Run Main (logos) / Go Build / generated	10s
Run Main (logos) / Go Linter / lint	27s
Run Main (logos) / Go Test / test	44s
Run Main (loop) / Go Build / generated	12s
Run Main (loop) / Go Linter / lint	35s
Run Main (loop) / Go Test / test	45s
	7m 36s

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