Add named query quiet mode to hide query text during execution

[godtechwak]

Description

This PR adds a "quiet mode" for named query execution that hides the query text
and only shows the results.

Changes:

• Added hide_named_query_text configuration option in pgclirc
• Implemented \nq command to toggle quiet mode at runtime
• Modified query output logic to hide query text when:
  • Quiet mode is enabled
  • Command is a named query execution (\n <name>)
  • Query executed successfully
• Applied quiet mode to console output, output files (\o), and log files

Use case: When executing saved named queries, users may want to see only the
results without the query text cluttering the output. This is especially useful
for lengthy queries or when running queries repeatedly, making the output cleaner
and more focused on the actual results.

[j-bennet]

Your use case could be solved by just adding \nq that would do the same as \n but quietly and not complicating things with another config option. WDYT?

[godtechwak]

n and q are far apart on the keyboard, which makes repeated input tiring and inefficient.
Also, users are already accustomed to using the \n command. Even if a new command is added that behaves the same way (a quiet mode), it would still introduce friction and inconvenience in everyday use.
For these reasons, I chose to add a toggle-style option instead.

[j-bennet]

You'd most likely use arrow up for repeated input. But I'm not totally opposed to \nq.

[j-bennet]

Thanks for the PR. Going to merge! 🍒