Breaking changes

Changed the plugin name gjs-preset-webpage -> grapesjs-preset-webpage
Removed internal plugins and all related options blocksBasicOpts, navbarOpts, countdownOpts, formsOpts, exportOpts, filestackOpts. Now if you need some of the previously used plugin you have to import and configure it as you would do with any other plugin.
All style manager options like textGeneral, textLayout, textTypography, textDecorations, textExtra, customStyleManager are now removed in favor of the default core one.

New

Added block option for the customization of blocks in this plugin.
Added useCustomTheme option which replaces the need for the CSS file for the custom preset theme.