add: loading bar on regen

src/main.py

@@ -99,12 +99,15 @@ def gen_bulk(bulk_path: Path):
 
 
 def regen(bulk_path: Path, is_thumb: bool, is_small: bool):
-        for page in scan_pages(bulk_path.get_dirs()):
+    pages: list[BulkPage] = scan_pages(bulk_path.get_dirs())
+    with Bar("Generating albums...", max=len(pages)) as bar:
+        for page in pages:
             for picture in page.get_pictures():
                 if is_thumb:
                     picture.gen_thumb()
                 if is_small:
                     picture.gen_small()
+            bar.next()
     
 def gen_home(site_path: Path) -> None:
     home_path = Path(site_path, "index.html")