Summary

This PR restores stargo for current StarRocks deployment workflows and adds shared-data support.

Main changes:

• Add CN configuration, deployment, start/stop/display/import support.
• Add shared-data deployment flow with FE + CN.
• Add shared-data readiness checks after deploy and CN start.
• Keep shared-data operations on FE + CN paths instead of BE paths.
• Preserve user-provided FE/BE/CN data and log directories during import.
• Add semantic StarRocks version comparison for upgrade/downgrade checks.
• Add JDK 17 support, build scripts, CI, validation docs, and focused tests.

Validation

Local checks on the official repository branch:

• go test ./...
• go build ./...
• go vet ./...
• test -z "$(gofmt -l .)"

Manual Multipass validation:

• StarRocks 4.0.0 shared-data, 1FE + 1CN + MinIO: PASS
• StarRocks 4.0.0 shared-data, 3FE + 2CN + MinIO: PASS
• StarRocks 3.5.15 shared-nothing, 1FE + 1BE: PASS

Manual scenarios covered:

• display
• SQL CRUD
• role-level stop/start
• import
• shared-data readiness
• CN offline failure propagation
• MinIO unavailable readiness failure
• same-version upgrade/downgrade rejection

Known limits

• Default CI does not start real StarRocks processes.
• CentOS packages are compatibility targets but not yet manually validated.
• latest 4.x stable beyond 4.0.0 is not yet manually validated.
• Real cross-version upgrade was not executed; this PR validates shared-data path boundaries and same-version rejection.
• import is strict: if a configured node is unreachable, import fails instead of producing partial metadata.
• shared-data cold start or node recovery may require longer tablet creation time; StarRocks may need tablet_create_timeout_second adjusted for slow environments.