Add Assert, AssertIfTrue and AssertIfFalse attributes

Author: carlos-granados

README.md

@@ -96,6 +96,8 @@ These are the available attributes and their corresponding PHPDoc annotations:
 | Attribute                                                                                                         | PHPDoc Annotations                   |
 |-------------------------------------------------------------------------------------------------------------------|--------------------------------------|
 | [Assert](https://github.com/php-static-analysis/attributes/blob/main/doc/Assert.md)                               | `@assert`                            |
+| [AssertIfFalse](https://github.com/php-static-analysis/attributes/blob/main/doc/AssertIfFalse.md)           | `@assert-if-false`                   |
+| [AssertIfTrue](https://github.com/php-static-analysis/attributes/blob/main/doc/AssertIfTrue.md)             | `@assert-if-true`                    |
 | [DefineType](https://github.com/php-static-analysis/attributes/blob/main/doc/DefineType.md)                       | `@type`                              |
 | [Deprecated](https://github.com/php-static-analysis/attributes/blob/main/doc/Deprecated.md)                       | `@deprecated`                        |
 | [Immmutable](https://github.com/php-static-analysis/attributes/blob/main/doc/Immmutable.md)                       | `@immmutable`                        |