Next.js@12: Next.js 12 should provide better performance and stuffs.
.babelrc: .babelrc has been removed to take advantage of Next.js' SWC backend (which offers faster build times) - if the file was still present, Babel would automatically be chosen over SWC.
.yarnclean: Commented out the "images" yarnclean directive, as it was causing issues with Next.js.
next-pwa: next-pwa has been updated, and next.config.js has been updated to use its newer API.
react: React has been updated to React 18. The @types package could not use the latest version due to some issues with the package itself.
rich-markdown-editor: rich-markdown-editor could not be updated due to issues with theming.
BREAKING-CHANGE: Next.js and React have been upgraded to their later versions.
