feat(assets): Change default CSS framework to Tailwind

* enhance(view): Add light default styling for Tailwind
* chore(view): Clean up unnecessary selectors and spacing
* feat(acorn): Update Acorn for Laravel 8.x
* chore(acorn): Create default `bootstrap/` project directory for Laravel 8.x
* refactor(acorn): Split the Acorn bootloader between `functions.php` and `bootstrap/app.php` to coincide with Laravel
* refactor(assets): Lighten the out of the box CSS boilerplate
* refactor(assets): Rename `dist/` to `public/` to coincide with Laravel
* refactor(assets): Flatten the `assets/` directory into `resources/` to coincide with Laravel
* refactor(assets): Rename `scripts/` to `js/` to coincide with Laravel
* refactor(assets): Rename `styles/` to `css/` to coincide with Laravel
* feat(deps): Update to Laravel Mix ^6.0
* chore(deps): Change Mix-related package.json `scripts` to the new `mix` binary
* chore(deps): Remove PurgeCSS in favor of Tailwind's built in purge
* chore(deps): Remove deprecated/unnecessary/unused dependencies
* chore(deps): Bump minimum PHP version to 7.3 to coincide with Laravel 8.x

resources/views/layouts/app.blade.php

@@ -1,15 +1,15 @@
-@include('partials.header')
+<div class="max-w-3xl mx-auto">
+  @include('partials.header')
 
-<div class="container">
-  <main class="main">
-    @yield('content')
-  </main>
+    <main class="py-8 prose main">
+      @yield('content')
+    </main>
 
-  @hasSection('sidebar')
-    <aside class="sidebar">
-      @yield('sidebar')
-    </aside>
-  @endif
+    @hasSection('sidebar')
+      <aside class="sidebar">
+        @yield('sidebar')
+      </aside>
+    @endif
+
+  @include('partials.footer')
 </div>
-
-@include('partials.footer')