feat: Add PostsController and configure routes

- Added a new file `PostsController.php` in the `app/Http/Controllers` directory.
- Implemented the `index()` method to retrieve all posts using the Sheets facade.
- Implemented the `show()` method to display a single post using route model binding with Sheets.
- Updated the `RouteServiceProvider.php` file to bind the 'post' route parameter to retrieve posts from the Sheets collection.
- Created a new configuration file `sheets.php` in the `config` directory, defining default settings for collections and their corresponding sheet classes, path parsers, content parsers, and extensions.
- Added a new markdown file `hello-world.md` in the `content/posts` directory as an example post.
- Created two new blade view files: `index.blade.php` and `show.blade.php`, under the `resources/views/posts` directory, for displaying lists of posts and individual post details respectively.
- Modified the existing web routes (`web.php`) to include routes for accessing posts.

The changes enable users to view all posts on `/posts`, as well as access individual post details at `/post/{post}`.

resources/views/posts/index.blade.php

@@ -0,0 +1,20 @@
+@extends('layouts.app')
+
+@section('title', 'Heimerdinger.LoL • Posts')
+@section('description', 'Explore all champion skins on Heimerdinger.LoL. Find detailed information on popular skins
+such as Dark Cosmic Jhin, HEARTSTEEL Ezreal, PROJECT: Vayne and more!')
+
+@section('content')
+    <section class="max-w-screen-xl mx-auto mt-12">
+        <h1
+            class="text-3xl font-bold text-center text-transparent uppercase sm:text-4xl
+        bg-gradient-to-bl from-orange-300 to-orange-500 bg-clip-text">
+            Posts</h1>
+        <h2 class="text-center text-orange-400 text-sm uppercase font-medium">Latest posts about League of Legends</h2>
+        @foreach($posts as $post)
+            {{ $post->title }}
+            {{ $post->description}}
+
+        @endforeach
+    </section>
+@endsection