Add DiscoverController and hashtag posts view

app/Http/Controllers/DiscoverController.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+use App\{Hashtag, Status, StatusHashtag};
+
+class DiscoverController extends Controller
+{
+    public function home()
+    {
+      return view('discover.home');
+    }
+
+    public function showTags(Request $request, $hashtag)
+    {
+      $tag = Hashtag::whereSlug($hashtag)->firstOrFail();
+      $posts = $tag->posts()->has('media')->orderBy('id','desc')->paginate(12);
+      $count = $tag->posts()->has('media')->orderBy('id','desc')->count();
+      return view('discover.tags.show', compact('tag', 'posts', 'count'));
+    }
+}