feat: make to nuon raw option remove all white space (#15609)

# Description
Fixes #9942

This adds a new `--minified` flag to `to nuon` which removes all
possible white space. I added an example test to demonstrate the
functionality.

# User-Facing Changes

New flag becomes available to the user.

crates/nu_plugin_nu_example/nu_plugin_nu_example.nu

@@ -125,7 +125,7 @@ def process_call [
   # Use this information to implement your plugin logic
 
   # Print the call to stderr, in raw nuon and as a table
-  $plugin_call | to nuon --raw | print -e
+  $plugin_call | to nuon | print -e
   $plugin_call | table -e | print -e
 
   # Get the span from the call
@@ -264,4 +264,4 @@ def start_plugin [] {
     }) |
     each { from json | handle_input } |
     ignore
-}
+}