Add poopt.pyi

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

poezio/poopt.pyi

@@ -0,0 +1,7 @@
+
+from typing import List, Tuple
+
+def xwcwidth(c: str) -> int: ...
+def cut_text(string: str, width: int) -> List[Tuple[int, int]]: ...
+def wcswidth(string: str) -> int: ...
+def cut_by_columns(string: str, limit: int) -> str: ...