feat: Add is_init_method property

Author: pawamoy

src/griffe/_internal/models.py

@@ -852,6 +852,11 @@ def is_type_alias(self) -> bool:
         """
         return self.kind is Kind.TYPE_ALIAS
 
+    @property
+    def is_init_method(self) -> bool:
+        """Whether this function is an `__init__` method."""
+        return False
+
     @property
     def is_init_module(self) -> bool:
         """Whether this object is an `__init__.py` module.
@@ -1822,6 +1827,14 @@ def imports_future_annotations(self) -> bool:
         """Whether this module import future annotations."""
         return cast("Module", self.final_target).imports_future_annotations
 
+    @property
+    def is_init_method(self) -> bool:
+        """Whether this method is an `__init__` method.
+
+        See also: [`is_method`][griffe.Alias.is_method].
+        """
+        return cast("Function", self.final_target).is_init_method
+
     @property
     def is_init_module(self) -> bool:
         """Whether this module is an `__init__.py` module.
@@ -2432,6 +2445,11 @@ def resolve(self, name: str) -> str:
             return resolved
         return super().resolve(name)
 
+    @property
+    def is_init_method(self) -> bool:
+        """Whether this function is an `__init__` method."""
+        return bool(self.parent and self.parent.is_class and self.name == "__init__")
+
     def as_dict(self, **kwargs: Any) -> dict[str, Any]:
         """Return this function's data as a dictionary.