Add Kashmiri Language Localization and Improve Related Documentation

[mirnumaan]

Proposed change

This pull request adds Kashmiri language localization support to the OWASP Nettacker project. All user-facing strings have been translated, allowing Kashmiri-speaking users to better understand and interact with the tool.

Type of change

• New core framework functionality
• Bugfix (non-breaking change which fixes an issue)
• Code refactoring without any functionality changes
• New or existing module/payload change
• Localization improvement
• Dependency upgrade
• Documentation improvement

Checklist

• I've followed the contributing guidelines
• I've run make pre-commit, it didn't generate any changes
• I've run make test, all tests passed locally