Create io.pyi

include/typings/io.pyi

@@ -0,0 +1,17 @@
+
+class FileIO:
+    def __new__(cls, file: str, mode: str) -> "FileIO": ...
+
+    def __enter__(self) -> "FileIO": ...
+    def __exit__(self) -> None: ...
+
+    def read(self, size: int | None = None) -> bytes: ...
+    def write(self, data: bytes) -> int: ...
+    def close(self) -> None: ...
+    def tell(self) -> int: ...
+    def seek(self, offset: int, whence: int) -> None: ...
+    def flush(self) -> None: ...
+
+SEEK_SET: int
+SEEK_CUR: int
+SEEK_END: int