feat: add custom ipxe bootloader

- add rpm to manage tftpboot ipxe images for cobbler

rpms/unkin-undionly-kpxe/Dockerfile

@@ -0,0 +1,18 @@
+FROM git.unkin.net/unkin/almalinux9-rpmbuilder:latest
+
+# Create output directory for RPMs
+RUN mkdir -p /app/dist
+
+# Set working directory
+WORKDIR /app
+
+ARG PACKAGE_RELEASE
+ENV PACKAGE_RELEASE=${PACKAGE_RELEASE}
+ARG PACKAGE_VERSION
+ENV PACKAGE_VERSION=${PACKAGE_VERSION}
+
+# Copy nfpm.yaml from the context into the container
+COPY resources /app/resources
+
+# Default command to build RPMs
+CMD /app/resources/build.sh