Refactored ban system

Implemented a Reddit-like account suspension system (similar to subreddit bans). This makes it easier to ban users from the app, and the code has also been cleaned up.

The interface was also revamped.

database/migrations/2021_07_20_094139_change_bans_table.php

@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class ChangeBansTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('bans', function (Blueprint $table) {
+
+            $table->dropColumn('userAgent');
+            $table->boolean('isPermanent')->default(false);
+
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('bans', function (Blueprint $table) {
+           $table->dropColumn('isPermanent');
+           $table->string('userAgent')->after('bannedUntil');
+        });
+    }
+}