ui/curses: add curses interface draft

pqcli/ui/curses/widgets/label.py

@@ -0,0 +1,10 @@
+from .base import WindowWrapper
+
+
+class Label(WindowWrapper):
+    def set_text(self, text: str) -> None:
+        if not self._win:
+            return
+        self._win.erase()
+        self._win.addnstr(text, min(len(text), self.getmaxyx()[1] - 1))
+        self._win.refresh()