Feat: Update Fronted to Next13

[EzeRangel]

This PR contains an upgraded version of Next.js with the following changes:

• No longer needs a custom express server
• Adds support for TypeScript
• Changed the static folder to Next 13 public folder
• Updates dynamic posts, pages and categories content types
• Every page is intended to be static and prerendered, instead of server side generated.

TODOs

• Make work the preview functionality.
• Typecheck the WPAPI dependency
• Check the posibility to migrate to the Next 13 appdirectory