chore(make): Split and enhancements

- split Makefile in several sub files
- use a separated container for tests
-

oci/builder/Containerfile

@@ -0,0 +1,8 @@
+ARG GOVERSION=1.24
+FROM docker.io/golang:${GOVERSION}
+# install helm
+RUN set -xe; \
+  apt-get update && apt-get install -y curl; \
+  curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+
+

oci/description

@@ -0,0 +1,4 @@
+Katenary transforms docker/podman compose files to Helm Charts.
+It harnesses the labels from your "compose" file to craft complete Helm Charts effortlessly, saving you time and energy.
+- Simple automated CLI: Katenary handles the grunt work, generating everything needed for seamless service binding and Helm Chart creation.
+- Effortless Efficiency: You only need to add labels when it's necessary to precise things. Then call katenary convert and let the magic happen.

oci/packager/Containerfile

@@ -0,0 +1,20 @@
+FROM registry.fedoraproject.org/fedora:42
+RUN set -eux; \
+  microdnf -y install \
+  rubygems rpmbuild rpmsign bsdtar mingw-nsis-base.x86_64 mingw32-nsis.noarch gpg2; \
+  microdnf clean all;
+
+# create user with 999 UID/GID
+RUN set -eux; \
+  groupadd -g 1001 builder; \
+  useradd -m -u 1001 -g 1001 -d /home/builder -s /bin/bash builder; \
+  chown builder:builder /home/builder
+
+USER builder
+ENV PATH="/home/builder/bin:${PATH}"
+WORKDIR /home/builder
+RUN set -eux; \
+  gem install fpm
+
+
+