feat: add jsonnet and jsonnet-lint packages

Add RPM packages for jsonnet v0.21.0 built from go-jsonnet:
- jsonnet: main interpreter and jsonnetfmt formatter
- jsonnet-lint: linter for Jsonnet files

Both packages use Go 1.24.7 as required by go-jsonnet v0.21.0.

rpms/jsonnet/resources/nfpm.yaml

@@ -0,0 +1,36 @@
+# nfpm.yaml
+
+name: jsonnet
+version: ${PACKAGE_VERSION}
+release: ${PACKAGE_RELEASE}
+arch: amd64
+platform: linux
+section: default
+priority: extra
+description: "A data templating language"
+maintainer: Google
+homepage: https://github.com/google/go-jsonnet
+license: Apache-2.0
+
+disable_globbing: false
+
+replaces:
+  - jsonnet
+
+provides:
+  - jsonnet
+
+# Files to include in the package
+contents:
+  - src: /app/jsonnet
+    dst: /usr/bin/jsonnet
+    file_info:
+      mode: 0755
+      owner: root
+      group: root
+  - src: /app/jsonnetfmt
+    dst: /usr/bin/jsonnetfmt
+    file_info:
+      mode: 0755
+      owner: root
+      group: root