Re-organize directory structure (#4971)

See discussion in #2491

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

stdlib/gettext.pyi

@@ -0,0 +1,80 @@
+import sys
+from _typeshed import StrPath
+from typing import IO, Any, Container, Iterable, Optional, Sequence, Type, TypeVar, overload
+from typing_extensions import Literal
+
+class NullTranslations:
+    def __init__(self, fp: Optional[IO[str]] = ...) -> None: ...
+    def _parse(self, fp: IO[str]) -> None: ...
+    def add_fallback(self, fallback: NullTranslations) -> None: ...
+    def gettext(self, message: str) -> str: ...
+    def lgettext(self, message: str) -> str: ...
+    def ngettext(self, msgid1: str, msgid2: str, n: int) -> str: ...
+    def lngettext(self, msgid1: str, msgid2: str, n: int) -> str: ...
+    if sys.version_info >= (3, 8):
+        def pgettext(self, context: str, message: str) -> str: ...
+        def npgettext(self, context: str, msgid1: str, msgid2: str, n: int) -> str: ...
+    def info(self) -> Any: ...
+    def charset(self) -> Any: ...
+    def output_charset(self) -> Any: ...
+    def set_output_charset(self, charset: str) -> None: ...
+    def install(self, names: Optional[Container[str]] = ...) -> None: ...
+
+class GNUTranslations(NullTranslations):
+    LE_MAGIC: int
+    BE_MAGIC: int
+    CONTEXT: str
+    VERSIONS: Sequence[int]
+
+def find(domain: str, localedir: Optional[StrPath] = ..., languages: Optional[Iterable[str]] = ..., all: bool = ...) -> Any: ...
+
+_T = TypeVar("_T")
+@overload
+def translation(
+    domain: str,
+    localedir: Optional[StrPath] = ...,
+    languages: Optional[Iterable[str]] = ...,
+    class_: None = ...,
+    fallback: bool = ...,
+    codeset: Optional[str] = ...,
+) -> NullTranslations: ...
+@overload
+def translation(
+    domain: str,
+    localedir: Optional[StrPath] = ...,
+    languages: Optional[Iterable[str]] = ...,
+    class_: Type[_T] = ...,
+    fallback: Literal[False] = ...,
+    codeset: Optional[str] = ...,
+) -> _T: ...
+@overload
+def translation(
+    domain: str,
+    localedir: Optional[StrPath] = ...,
+    languages: Optional[Iterable[str]] = ...,
+    class_: Type[_T] = ...,
+    fallback: Literal[True] = ...,
+    codeset: Optional[str] = ...,
+) -> Any: ...
+def install(
+    domain: str, localedir: Optional[StrPath] = ..., codeset: Optional[str] = ..., names: Optional[Container[str]] = ...
+) -> None: ...
+def textdomain(domain: Optional[str] = ...) -> str: ...
+def bindtextdomain(domain: str, localedir: Optional[StrPath] = ...) -> str: ...
+def bind_textdomain_codeset(domain: str, codeset: Optional[str] = ...) -> str: ...
+def dgettext(domain: str, message: str) -> str: ...
+def ldgettext(domain: str, message: str) -> str: ...
+def dngettext(domain: str, msgid1: str, msgid2: str, n: int) -> str: ...
+def ldngettext(domain: str, msgid1: str, msgid2: str, n: int) -> str: ...
+def gettext(message: str) -> str: ...
+def lgettext(message: str) -> str: ...
+def ngettext(msgid1: str, msgid2: str, n: int) -> str: ...
+def lngettext(msgid1: str, msgid2: str, n: int) -> str: ...
+
+if sys.version_info >= (3, 8):
+    def pgettext(context: str, message: str) -> str: ...
+    def dpgettext(domain: str, context: str, message: str) -> str: ...
+    def npgettext(context: str, msgid1: str, msgid2: str, n: int) -> str: ...
+    def dnpgettext(domain: str, context: str, msgid1: str, msgid2: str, n: int) -> str: ...
+
+Catalog = translation