Implemented internal blocklist sourcing

Switched from using external CSV exports to having the system talk to
instances directly to build and update the database.

NOTE: Added a new table called Source with the corresponding model to
access it

app/Models/Source.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Source extends Model
+{
+    use HasFactory;
+
+    protected $table    = "source";
+    public $timestamps  = false;
+    protected $fillable = ["url", "type", "active", "format", "token"];
+}