feat: add jsonnet-language-server package configuration

Add complete RPM package configuration for jsonnet-language-server v0.16.0 including Dockerfile, build scripts, and nfpm configuration for cross-distro builds.

rpms/jsonnet-language-server/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 resources from the context into the container
+COPY resources /app/resources
+
+# Default command to build RPMs
+CMD /app/resources/build.sh