Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stubs/characteristic/METADATA.toml

@@ -0,0 +1,2 @@
+version = "0.1"
+python2 = true

stubs/characteristic/characteristic/__init__.pyi

@@ -0,0 +1,35 @@
+from typing import Any, AnyStr, Callable, Dict, Optional, Sequence, Type, TypeVar, Union
+
+def with_repr(attrs: Sequence[Union[AnyStr, Attribute]]) -> Callable[..., Any]: ...
+def with_cmp(attrs: Sequence[Union[AnyStr, Attribute]]) -> Callable[..., Any]: ...
+def with_init(attrs: Sequence[Union[AnyStr, Attribute]]) -> Callable[..., Any]: ...
+def immutable(attrs: Sequence[Union[AnyStr, Attribute]]) -> Callable[..., Any]: ...
+def strip_leading_underscores(attribute_name: AnyStr) -> AnyStr: ...
+
+NOTHING = Any
+
+_T = TypeVar("_T")
+
+def attributes(
+    attrs: Sequence[Union[AnyStr, Attribute]],
+    apply_with_cmp: bool = ...,
+    apply_with_init: bool = ...,
+    apply_with_repr: bool = ...,
+    apply_immutable: bool = ...,
+    store_attributes: Optional[Callable[[type, Attribute], Any]] = ...,
+    **kw: Optional[Dict[Any, Any]],
+) -> Callable[[Type[_T]], Type[_T]]: ...
+
+class Attribute:
+    def __init__(
+        self,
+        name: AnyStr,
+        exclude_from_cmp: bool = ...,
+        exclude_from_init: bool = ...,
+        exclude_from_repr: bool = ...,
+        exclude_from_immutable: bool = ...,
+        default_value: Any = ...,
+        default_factory: Optional[Callable[[None], Any]] = ...,
+        instance_of: Optional[Any] = ...,
+        init_aliaser: Optional[Callable[[AnyStr], AnyStr]] = ...,
+    ) -> None: ...