Add ContentLayer to parse YAML files

We've integrated ContentLayer for YAML file parsing. This translates to automatic type definitions for stronger TypeScript support and paves the way for future expansions — think effortless addition of pages from markdown files in the future.

First Release - Next Landing v0.1.0

This is the first release of Next Landing, a landing page project built with Next.js for small businesses seeking a clean and professional online presence. Easily customizable using YAML files, the landing page uses static site generation for faster load times, improved SEO, and reduced server load.