ci: publish helm chart to GHCR

[dittops]

Summary

• Add release workflow that packages examples/kubernetes/firecrawl-helm and pushes it as an OCI artifact to ghcr.io/budecosystem/charts/firecrawl on every Chart.yaml version bump (also supports manual dispatch with an optional version override).
• Add lint workflow that runs helm lint + helm template (base values and prod overlay) on PRs touching the chart.
• Update chart README with public GHCR install instructions.

Notes

• First merge to main will publish version 0.2.0 and create the GHCR package.
• The new package will default to private — visit the org's Packages settings and flip charts/firecrawl to Public so anonymous helm pull works. Subsequent versions inherit the visibility.
• Workflow skips republishing if the chart version already exists on GHCR.

Test plan

• Merge to main and confirm Release Helm Chart workflow completes successfully.
• Flip GHCR package visibility to public.
• From a clean machine: helm pull oci://ghcr.io/budecosystem/charts/firecrawl --version 0.2.0 succeeds without auth.
• helm upgrade --install firecrawl oci://ghcr.io/budecosystem/charts/firecrawl --version 0.2.0 -n firecrawl --create-namespace renders and installs.
• Open a follow-up PR editing the chart and verify Lint Helm Chart runs.

🤖 Generated with Claude Code

[gemini-code-assist]

Code Review

This pull request updates the Helm chart documentation to include instructions for installing from the GitHub Container Registry (GHCR) and adds steps for pulling and inspecting the chart locally. The review feedback highlights that the updated installation command is missing necessary configuration flags for values files and that the manual push example should be updated to use the new registry path for consistency.

[gemini-code-assist]

The installation command is missing the -f values.yaml and -f overlays/prod/values.yaml flags that were present in the previous version. Since the chart's default values.yaml contains several empty placeholders for critical configuration (e.g., API keys, database URLs), the installation will likely fail or be non-functional without providing these configuration files.

Suggested change

	helm upgrade --install firecrawl oci://ghcr.io/budecosystem/charts/firecrawl \
	--version 0.2.0 \
	-n firecrawl --create-namespace
	helm upgrade --install firecrawl oci://ghcr.io/budecosystem/charts/firecrawl \
	--version 0.2.0 \
	-n firecrawl --create-namespace \
	-f values.yaml \
	-f overlays/prod/values.yaml

[gemini-code-assist]

The manual push example still references the old registry oci://registry-1.docker.io/winkkgmbh. It should be updated to use the new GHCR registry path (oci://ghcr.io/budecosystem/charts) to maintain consistency with the rest of the documentation and the new CI workflow.

Suggested change

	HELM_NO_PLUGINS=1 helm push /tmp/helm-packages/firecrawl-0.2.0.tgz oci://registry-1.docker.io/winkkgmbh
	HELM_NO_PLUGINS=1 helm push /tmp/helm-packages/firecrawl-0.2.0.tgz oci://ghcr.io/budecosystem/charts