Add `scion build` command + Dockerfile hash fix#244

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scion/harness-local-build

Commits on Jun 11, 2026

Add `scion build` command for local harness-config image builds
Scion Agent (harness-local-build-p1)
committed
Address PR review: yaml.Node config update, error handling, dedup settings
Scion Agent (harness-local-build-p1)
committed
Guard against empty harness-config path and non-mapping YAML nodes
Scion Agent (harness-local-build-p1)
committed