refactor: standardize Dockerfile and build script structure

Standardize all RPM packages to use a consistent build pattern:
- Simple Dockerfiles that copy resources/ and call build.sh
- Move all build logic to resources/build.sh scripts
- Consolidate nfpm.yaml and scripts into resources/ directory
- Update base image to almalinux9-rpmbuilder for consistency

Changes:
- Refactored 37 packages total (simple + complex)
- HashiCorp tools: consul, vault, terraform, terragrunt, packer, nomad, nomad-autoscaler
- Development tools: g10k, etcd, nfpm, ruff, uv, unrar, nzbget, boilerplate
- VictoriaMetrics: vlutils, vmutils, victoria-logs
- Network tools: cni-plugins, consul-cni, unkin-ca-certificates
- Jellyfin suite: jellyfin-web, jellyfin-server, jellyfin-ffmpeg-bin
- System packages: puppet-initial, incus

This standardization improves maintainability and consistency across
the entire RPM build system while preserving all existing functionality.

rpms/packer/resources/build.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/bash
+
+# Install dependencies
+dnf install -y unzip
+
+# Download and extract packer
+wget -O /app/packer.zip https://releases.hashicorp.com/packer/${PACKAGE_VERSION}/packer_${PACKAGE_VERSION}_linux_amd64.zip
+unzip packer.zip
+
+# Build the RPM
+nfpm pkg --config /app/resources/nfpm.yaml --target /app/dist --packager rpm

rpms/packer/resources/nfpm.yaml

@@ -0,0 +1,38 @@
+# nfpm.yaml
+
+name: packer
+version: ${PACKAGE_VERSION}
+release: ${PACKAGE_RELEASE}
+arch: amd64
+platform: linux
+section: default
+priority: extra
+description: "Create identical images for multiple platforms from a single source configuration."
+
+maintainer: HashiCorp
+homepage: https://www.packer.io/
+license: BUSL-1.1
+
+disable_globbing: false
+
+replaces:
+  - packer
+
+provides:
+  - packer
+
+# Files to include in the package
+contents:
+  - src: /app/packer
+    dst: /usr/bin/packer
+    file_info:
+      mode: 0755
+      owner: root
+      group: root
+
+# Scripts to run during installation/removal (optional)
+# scripts:
+#   preinstall: ./scripts/preinstall.sh
+#   postinstall: ./scripts/postinstall.sh
+#   preremove: ./scripts/preremove.sh
+#   postremove: ./scripts/postremove.sh