refactor: Fix Deprecated github.com/golang/protobuf (#246)

* refactor: Add warning when import using dot prefix

* refactor: Fix Deprecated github.com/golang/protobuf

* fix: Update A-properti-public-dan-private.md

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Co-authored-by: afifurrohman-id <afifurrohman.id@gmail.com>
Co-authored-by: Noval Agung Prayogo <caknopal@gmail.com>

Author: 3 people