General changes

• Added per-package-manager default install options
• Added the ability to run pre-install/update/uninstall and post-install/update/uninstall commands
• Added the ability to kill process(es) before a package is installed/updated/uninstalled
• Block custom command-line arguments (and pre/post commands) behind a SecureSetting switch
  • SecureSettings are settings that require administrator privileges to be switched.
• Bundles won't import custom arguments & custom commands by default
• Bundles will show a security report when importing potentially dangerous settings
• Added a better crash message for when UniGetUI files are missing
• Deep improvements to how bundles and InstallOptions are loaded from disk.
• Improvements to WebView lifecycle

SHA256: 6CF978550119FF72940140C87A44B3568CDF96516FD52CD4F2AE4427780434ED