* Update Next.js and React versions in all packages
* Replace onRedirect function with next/link in BillingSessionStatus, since it's no longer cached by default
* Remove unused revalidatePath import in billing return page, since it's no longer cached by default
* Add Turbopack module aliases to improve development server speed
* Converted new Dynamic APIs to be Promise-based
* Adjust mobile layout
* Use ENABLE_REACT_COMPILER to enable the React Compiler in Next.js 15
* Report Errors using the new onRequestError hook
This commit refactors the CMS to handle two platforms: ContentLayer and WordPress. The CMS layer is abstracted into a core package, and separate implementations for each platform are created. This change allows the app to switch the CMS type based on environment variable, which can improve the flexibility of content management. It also updates several functions in the `server-sitemap.xml` route to accommodate these changes and generate sitemaps based on the CMS client. Further, documentation content and posts have been relocated to align with the new structure. Notably, this refactor is a comprehensive update to the way the CMS is structured and managed.
