feat: add announcement model with segments relationship.

app/Models/Announcement.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+/**
+ * Class Announcement
+ * @package App\Models
+ *
+ */
+class Announcement extends AbstractModel
+{
+    use SoftDeletes;
+
+    protected $table = 'announcements';
+
+    /**
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
+     **/
+    public function segments(): BelongsToMany
+    {
+        return $this->BelongsToMany(Segment::class);
+    }
+}