feat: add ad_save_images_dir (#689)

* feat: add `ad-save-images`

https://github.com/Bing-su/adetailer/issues/688

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* feat: only enable `ad_save_images_dir` when not empty

https://github.com/Bing-su/adetailer/pull/689#issuecomment-2300057990

* fix: F401 `pathlib.PurePath` imported but unused

https://results.pre-commit.ci/run/github/632823919/1724229072.nxpHBQU4QvaIJ8IOFayT1Q

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

scripts/!adetailer.py

@@ -566,9 +566,14 @@ class AfterDetailerScript(scripts.Script):
         seed, _ = self.get_seed(p)
 
         if opts.data.get(condition, False):
+            ad_save_images_dir = opts.data.get("ad_save_images_dir", None)
+
+            if not bool(ad_save_images_dir and ad_save_images_dir.strip()):
+                ad_save_images_dir = p.outpath_samples
+
             images.save_image(
                 image=image,
-                path=p.outpath_samples,
+                path=ad_save_images_dir,
                 basename="",
                 seed=seed,
                 prompt=save_prompt,
@@ -973,6 +978,16 @@ def on_ui_settings():
         .needs_reload_ui(),
     )
 
+    shared.opts.add_option(
+        "ad_save_images_dir",
+        shared.OptionInfo(
+            default="",
+            label="Output directory for adetailer images",
+            component=gr.Textbox,
+            section=section,
+        ),
+    )
+
     shared.opts.add_option(
         "ad_save_previews",
         shared.OptionInfo(False, "Save mask previews", section=section),