refactor: add rector to enforce type declarations, code quality + style and remove dead code

- update CI process to include quality stage (tests + code review)
- add captainhook to install git pre-commit & pre-push hooks
- remove .devcontainer Dockerfile to use project's docker-compose services: all
services can now be started automatically using vscode
- update docs/setup-development.md

app/Libraries/Analytics/Models/AnalyticsUnknownUseragentsModel.php

@@ -10,17 +10,31 @@
 
 namespace Analytics\Models;
 
+use Analytics\Entities\AnalyticsUnknownUseragents;
 use CodeIgniter\Model;
 
 class AnalyticsUnknownUseragentsModel extends Model
 {
+    /**
+     * @var string
+     */
     protected $table = 'analytics_unknown_useragents';
+    /**
+     * @var string
+     */
     protected $primaryKey = 'id';
 
-    protected $allowedFields = [];
-
-    protected $returnType = \Analytics\Entities\AnalyticsUnknownUseragents::class;
+    /**
+     * @var string
+     */
+    protected $returnType = AnalyticsUnknownUseragents::class;
+    /**
+     * @var bool
+     */
     protected $useSoftDeletes = false;
 
+    /**
+     * @var bool
+     */
     protected $useTimestamps = false;
 }