GrapesJS PostCSS Parser

The `grapesjs-parser-postcss` plugin provides a custom CSS parser for the GrapesJS web page builder, leveraging PostCSS to handle CSS parsing. This is crucial for avoiding inconsistencies that can arise when importing HTML/CSS templates or embedding custom code directly, as the default browser's CSS Object Model (CSSOM) can be unreliable. The current stable version is `1.0.3`. This plugin primarily focuses on compatibility and fixes, with recent updates ensuring it works seamlessly with the latest GrapesJS versions and PostCSS v8. Its key differentiator is providing a robust and consistent CSS parsing mechanism within GrapesJS, addressing potential styling issues that default browser parsing might introduce, making it an essential tool for advanced GrapesJS usage involving custom CSS structures.