Document ICensorshipFormField

Closes #538

Author: BurntimeX

docs/php/api/form_builder/form_fields.md

@@ -445,7 +445,7 @@ SingleSelectionFormField::create('example')
 ### `TextFormField`
 
 `TextFormField` is a form field that allows entering a single line of text.
-The class implements `IAttributeFormField`, `IAutoCompleteFormField`, `ICssClassFormField`, `IImmutableFormField`, `II18nFormField`, `IInputModeFormField`, `IMaximumLengthFormField`, `IMinimumLengthFormField`, `IPatternFormField`, and `IPlaceholderFormField`.
+The class implements `IAttributeFormField`, `IAutoCompleteFormField`, `ICensorshipFormField`, `ICssClassFormField`, `IImmutableFormField`, `II18nFormField`, `IInputModeFormField`, `IMaximumLengthFormField`, `IMinimumLengthFormField`, `IPatternFormField`, and `IPlaceholderFormField`.
 
 Example:
 
@@ -883,7 +883,7 @@ WysiwygFormContainer::create('message')
 
 `WysiwygFormField` is used for wysiwyg editor form fields.
 This class should, in general, not be used directly but only via `WysiwygFormContainer`.
-The class implements `IAttributeFormField`, `IMaximumLengthFormField`, `IMinimumLengthFormField`, and `IObjectTypeFormNode` and requires an object type of the object type definition `com.woltlab.wcf.message`.
+The class implements `IAttributeFormField`, `ICensorshipFormField`, `IMaximumLengthFormField`, `IMinimumLengthFormField`, and `IObjectTypeFormNode` and requires an object type of the object type definition `com.woltlab.wcf.message`.
 The following methods are specific to this form field class:
 
 - `autosaveId($autosaveId)` and `getAutosaveId()` can be used enable automatically saving the current editor contents in the browser using the given id.

docs/php/api/form_builder/structure.md

@@ -293,6 +293,15 @@ By default, form fields are not auto-focused.
 `TAutoFocusFormField` provides a default implementation of these two methods.
 
 
+#### `ICensorshipFormField`
+
+`ICensorshipFormField` has to be implemented by form fields that support the censorship function.
+The implementing class has to implement the methods `censorship(bool $censorship = true): static`, `hasCensorship(): bool`, and `validateCensorship(string $text): void`.
+`TCensorshipFormField` provides a default implementation of these methods.
+
+!!! warning "The implementing class has to validate the entered value manually by calling `validateCensorship()`."
+
+
 #### `ICssClassFormField`
 
 `ICssClassFormField` has to be implemented by form fields for which CSS classes can be added to the actual form element (in addition to adding CSS classes to the surrounding element via the class-related methods of `IFormNode`).