* Upgrade ESLint and related configurations to version 9
- Update ESLint to version 9.19.0
- Migrate ESLint configurations to flat config format
- Remove deprecated ESLint config files
- Update package dependencies and configurations
- Simplify ESLint setup across packages
- Remove unnecessary ESLint config blocks from package.json files
- Improved CI caching with Turborepo tasks
- Removed duplicate styles
* Some changes ported from the work on the makerkit.dev website related to the marketing sections of the kit, such as documentation
* Added slight background hue to make darker theme better looking
* Support more complex configurations for documentation navigations.
* Do not fetch content from Keystatic when non-needed
* Add cursor pointers in dropdown
* Updated packages
* Docs: Added Shadcn sidebar; added algorithm to automatically infer parents without needing to specify it.
* Extracted Markdoc compilation in a separate file
* Site Navigation: simplify nav by removing the border
* Docs Navigation: added TOC; improved layout on mobile
* 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
