fix(config): add short option for version command

Enhancing user experience by providing a shorthand option for version
command, reducing potential user errors and improving command-line
efficiency.

- Added `-v` as a shorthand for the `--version` command in the parser.
- Ensures quicker access to version information, aligning with common
  CLI practices.

Signed-off-by: Glenn <glenux@glenux.net>

src/config.cr

@@ -201,7 +201,7 @@ module CodePreloader
           @trace = true
         end
 
-        parser.on("--version", "Show version") do
+        parser.on("-v", "--version", "Show version") do
           @subcommand = Subcommand::Version
         end