Adds jrq, a convenience wrapper that loads connection details from
~/.jrqrc so users can run query mode without typing credentials each
time. deploy.sh now installs jrq alongside jrunner in all deploy modes,
with a /usr/local/bin symlink for global installs. jrq resolves the
jrunner binary relative to its own location to avoid hardcoded paths.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
