Use same option name on tests commands as input

[klapaudius]

Discussed in #44

^{Originally posted by klapaudius July 2, 2025}
In the documentation we can see

Test with specific JSON input
php bin/console mcp:test-tool MyCustomTool --input='{"param1":"value"}'

Test with specific arguments
php bin/console mcp:test-prompt MyCustomPrompt --arguments='{"topic":"AI","tone":"professional"}'

replace --arguments with --input for consistency.