Simplify npm scripts and update documentation

[gander]

Summary

This PR simplifies the npm script interface by removing individual visual testing shortcuts and consolidating all commands under a single cli script. Additionally, it updates user-facing documentation and error messages to reflect the new command structure and translates Polish text to English for better accessibility.

Key Changes

• Removed npm script shortcuts: Deleted visual:init, visual:generate, visual:test, visual:report, and visual:inspect scripts from package.json, consolidating all functionality under the existing cli script
• Updated command documentation: Changed all references from npm run visual:* to npm run cli <command> across error messages and usage instructions
• Internationalization: Translated Polish text to English in the custom reporter output:
  • "Testy zakonczone!" → "Tests completed!"
  • "Czas trwania:" → "Duration:"
  • "Aby otworzyc raport HTML, uruchom:" → "To open the HTML report, run:"

Files Modified

• package.json: Removed 5 npm script shortcuts
• reporters/custom-reporter.ts: Updated console output messages
• src/inspect-page.ts: Updated usage examples
• src/run-visual-tests.ts: Updated error messages
• src/viewport-config.ts: Updated error messages with new command syntax

Benefits

• Simpler npm script interface with a single entry point
• Reduced maintenance burden with fewer script definitions
• Improved user experience with English-language documentation
• Consistent command structure across all visual testing operations

https://claude.ai/code/session_01NcFYg2dH8LvV8vAQAXfR2X