feat: add RPM packaging with nfpm and Gitea registry publishing

Bundles the CLI into a standalone binary via bun compile, packages
as RPM with nfpm, and publishes to Gitea's built-in package registry.
Users install with: dnf config-manager --add-repo <gitea>/rpm.repo

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/build-rpm.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
+cd "$PROJECT_ROOT"
+
+export VERSION="${VERSION:-0.1.0}"
+
+echo "==> Building TypeScript..."
+pnpm build
+
+echo "==> Bundling standalone binary..."
+mkdir -p dist
+bun build src/cli/src/index.ts --compile --outfile dist/mcpctl
+
+echo "==> Packaging RPM..."
+nfpm pkg --packager rpm --target dist/
+
+RPM_FILE=$(ls dist/mcpctl-*.rpm 2>/dev/null | head -1)
+echo "==> Built: $RPM_FILE"
+echo "    Size: $(du -h "$RPM_FILE" | cut -f1)"
+rpm -qpi "$RPM_FILE"