:construction: add tagmap model

app/Models/TagMap.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class TagMap extends Model
+{
+    protected $keyType = 'string';
+	protected $fillable = ['table_name' , 'anchor_id', 'tag_id'];
+    use HasFactory;
+
+    public function progresschapter()
+    {
+        return $this->belongsTo('App\Models\ProgressChapter', 'anchor_id', 'uid'); //参数一:需要关联的父表类名,前面必须加上命名空间  注意:参数二:子表关联父表的字段 参数三:父表关联子表的字段
+    }
+}