V4.0.0

Refactor

• Refactor "Engine", task configuration no longer controlled by "Engine"
• Refactor the Rollup task, remove the projectType and replace it with "rollup.build, rollup.buildreact"

Rollup

• Add the "del" plugin: Clear the output directory before rolling up with rollup.
• All plugins can be configured as "false" to turn them off or customize the configuration.
• All Babel plugins can be configured as "false" to turn them off.

Remove

• Remove all packages related to Gulp
• Temporarily delete tasks related to CSS
• Delete the Babel task