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

tests/_support/Models/ExampleModel.php

@@ -4,17 +4,44 @@ use CodeIgniter\Model;
 
 class ExampleModel extends Model
 {
+    /**
+     * @var string
+     */
     protected $table = 'factories';
+    /**
+     * @var string
+     */
     protected $primaryKey = 'id';
 
+    /**
+     * @var string
+     */
     protected $returnType = 'object';
+    /**
+     * @var bool
+     */
     protected $useSoftDeletes = false;
 
+    /**
+     * @var string[]
+     */
     protected $allowedFields = ['name', 'uid', 'class', 'icon', 'summary'];
 
+    /**
+     * @var bool
+     */
     protected $useTimestamps = true;
 
+    /**
+     * @var mixed[]
+     */
     protected $validationRules = [];
+    /**
+     * @var mixed[]
+     */
     protected $validationMessages = [];
+    /**
+     * @var bool
+     */
     protected $skipValidation = false;
 }