Install WP CLI

Task: Install WP CLI tools

Implementation:

1. Download wp-cli.phar
   curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
2. Verify it:
   php wp-cli.phar --info
3. Add executable attribute:
   chmod +x wp-cli.phar
4. Move to bin directory with 'wp' name:
   sudo mv wp-cli.phar /usr/local/bin/wp
5. Test it working:
   wp --info

Done.