feat(oci): Add OCI image generation

Not fully tested but it should produce an image in ghcr.io

oci/katenary/Containerfile

@@ -0,0 +1,15 @@
+ARG GOVERSION=1.24
+
+FROM docker.io/golang:${GOVERSION} AS builder
+ARG VERSION=master
+RUN set -xe; \
+  CGO_ENABLED=0 go install -v github.com/katenary/katenary/cmd/katenary@$VERSION;
+
+FROM scratch
+LABEL org.opencontainers.image.source=https://github.com/katenary/katenary
+LABEL org.opencontainers.image.description="Katenary converts compose files to Helm Chart"
+LABEL org.opencontainers.image.licenses=MIT
+COPY --from=builder /go/bin/katenary /usr/local/bin/katenary
+VOLUME /project
+WORKDIR /project
+ENTRYPOINT ["/usr/local/bin/katenary"]