add new templates for saas, blog and school

[Josephat-S]

This pull request scaffolds a new Next.js monolith blog template with support for multiple themes, a sidebar or navbar layout, and demo content for articles, categories, and authors. It sets up all core configuration, theming, and structure for a modern, customizable blog.

The most important changes are:

Project Configuration and Tooling:

• Added essential configuration files for a Next.js project, including package.json with dependencies (Next.js 14, React 18, Tailwind CSS, TypeScript), next.config.js, postcss.config.js, and a Next.js-specific ESLint config. [1] [2] [3] [4]

Styling and Theming:

• Introduced globals.css with CSS variables for three design themes (Minimal Clean, Glassmorphism, Dark Terminal), and set up Tailwind CSS with theme extensions to use these variables throughout the app. [1] [2]

Layout and Structure:

• Implemented a flexible root layout in layout.tsx that conditionally renders a sidebar or navbar based on configuration, includes navigation, and supports theme switching. Integrated an AnimationProvider component for optional page transitions. [1] [2]

Demo Content Pages:

• Added starter pages for home, articles, categories, and authors, each with mock data and responsive layouts using Tailwind CSS. These pages demonstrate listing, filtering, and navigation patterns for a blog. [1] [2] [3] [4]

Component Abstractions:

• Created an AnimationProvider component that conditionally wraps children with Framer Motion animations if the Glassmorphism theme is selected, otherwise renders children directly.

Closes #16