Refactor safer.sh for improved readability

Implement main menu for SAFER tool

Update scan completion message display method

Implement security scan function in safer.sh

Add IP check and change functionality to safer.sh

Fix directory name in README instructions

Add main SAFER script

Rename project to NetworkDefender and enhance README

Update README for better formatting and clarity

repository URL in installation instructions

README with usage instructions and formatting

README.md for SAFER Security Tool

Add .gitignore to exclude temporary and system files