Documentation RuptGroup

doc/RuptGroup.md

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+Crudit RuptGroup 
+
+### Usage
+A RuptGroup is used to group element together by data.
+It can be activated in the following way, provided that the target field is a relationship, and all you have to do to activate it is pass it the value 1:
+
+```php
+$groupeTypeAttribut = Field::new('groupeTypeAttribut')->setRuptGroup(1);
+```
+And it's done !
+
+### Result
+
+Here is an example
+
+![](img/rupt_group.png)