Builder administration area

* Page builder foundation
* Form builder document type
* Dashboard builder document type
* Report builder document type
* Menu builder document type
* Email builder document type
* Query builder document type
* Workflow builder document type
* Reusable component registry
* Form-field registry
* Dashboard-widget registry
* Hero, heading, and rich-content components
* JSON document schema
* Saved builder documents
* Draft, published, and archived states
* Document version history
* Reusable builder templates
* Component rendering service
* Extensible BuilderComponent contract
* Authenticated Builder REST endpoints
* Administration navigation
* Builder permissions
* Module registration and test

Modules/Builder/Models/BuilderDocument.php

@@ -0,0 +1,10 @@
+<?php
+namespace Modules\Builder\Models;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+final class BuilderDocument extends Model
+{
+    protected $fillable=['site_id','type','name','slug','status','version','document','settings','buildable_type','buildable_id','created_by','updated_by','published_at'];
+    protected $casts=['document'=>'array','settings'=>'array','published_at'=>'datetime'];
+    public function versions(): HasMany { return $this->hasMany(BuilderDocumentVersion::class); }
+}