ui/curses: add curses interface draft

pqcli/ui/curses/widgets/progress_bar.py

@@ -0,0 +1,19 @@
+import curses
+
+from .base import WindowWrapper
+
+
+class ProgressBar(WindowWrapper):
+    def set_position(self, position: float, max_: float) -> None:
+        if not self._win:
+            return
+        self._win.erase()
+        text = f"{position / max_:.02%}"
+        x = max(0, (self.getmaxyx()[1] - len(text)) // 2)
+        self._win.addnstr(0, x, text, min(len(text), self.getmaxyx()[1] - 1))
+        x = int(position * self.getmaxyx()[1] // max_)
+        if x > 0:
+            self._win.chgat(0, 0, curses.A_REVERSE)
+            if x < self.getmaxyx()[1]:
+                self._win.chgat(0, x, curses.A_NORMAL)
+        self._win.refresh()