fix: use jq for completion name extraction to avoid nested matches

The regex "name":\s*"..." on JSON matched nested server names inside
project objects, mixing resource types in completions. Switch to
jq -r '.[].name' for proper top-level extraction. Add jq as RPM
dependency. Add pr.sh for PR creation via Gitea API.

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

nfpm.yaml

@@ -5,6 +5,8 @@ release: "1"
 maintainer: michal
 description: kubectl-like CLI for managing MCP servers
 license: MIT
+depends:
+  - jq
 contents:
   - src: ./dist/mcpctl
     dst: /usr/bin/mcpctl