Add option to control security check

[yamadashy]

This PR introduces an option to control the security check, allowing users to enable or disable the security check as needed.

related: #74

Key changes:

• Add new config option security.enableSecurityCheck (default is true)
• Update packager to conditionally run security check based on this setting

Implementation

• The security.enableSecurityCheck option is added to the configuration schema
• When set to false, the packager skips the security check process
• CLI output is updated to indicate whether the security check was performed or skipped
• Default behavior (security check enabled) remains unchanged for existing users