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}`.

app/Providers/RouteServiceProvider.php

@@ -7,6 +7,7 @@ use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvi
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\RateLimiter;
 use Illuminate\Support\Facades\Route;
+use Spatie\Sheets\Sheets;
 
 class RouteServiceProvider extends ServiceProvider
 {
@@ -24,6 +25,8 @@ class RouteServiceProvider extends ServiceProvider
      */
     public function boot(): void
     {
+        parent::boot();
+
         RateLimiter::for('api', function (Request $request) {
             return Limit::perMinute(60)->by($request->user()?->id ?: $request->ip());
         });
@@ -36,5 +39,11 @@ class RouteServiceProvider extends ServiceProvider
             Route::middleware('web')
                 ->group(base_path('routes/web.php'));
         });
+
+        Route::bind('post', function ($path) {
+            return $this->app->make(Sheets::class)
+                ->collection('posts')
+                ->get($path) ?? abort(404);
+        });
     }
 }