protolint: configure protolint and fix the protolinting issues

This PR addresses the following:
- Install and Configure protolint to enforce the protobuf style guide rules in the CI.
- Fix the protolinting issues (package and import ordering) while maintaining the comaptibility.

.github/workflows/main.yml

@@ -134,6 +134,9 @@ jobs:
       - name: check go modules tidiness 
         run: make tidy-module-check
 
+      - name: lint proto files
+        run: make protolint
+
       - name: lint
         run: GOGC=50 make lint