add metadata-scrubbing tool

nix/packages/metadata-scrub/default.nix

@@ -0,0 +1,23 @@
+{
+  # Snowfall Lib provides a customized `lib` instance with access to your flake's library
+  # as well as the libraries available from your flake's inputs.
+  # You also have access to your flake's inputs.
+
+  # The namespace used for your flake, defaulting to "internal" if not set.
+
+  # All other arguments come from NixPkgs. You can use `pkgs` to pull packages or helpers
+  # programmatically or you may add the named attributes as arguments here.
+  pkgs,
+  ...
+}:
+
+pkgs.resholve.writeScriptBin "metadata-scrub" {
+  inputs = with pkgs; [
+    exiftool
+    toybox
+  ];
+  execer = [
+    "cannot:${pkgs.exiftool}/bin/exiftool"
+  ];
+  interpreter = "${pkgs.bash}/bin/bash";
+} (builtins.readFile ./metadata-scrub.sh)

nix/packages/metadata-scrub/metadata-scrub.sh

@@ -0,0 +1,20 @@
+
+# Check if a folder is provided
+if [[ -z "$1" ]]; then
+  echo "Usage: $0 <folder>"
+  exit 1
+fi
+
+FOLDER="$1"
+
+# Ensure the folder exists
+if [[ ! -d "$FOLDER" ]]; then
+  echo "Error: Folder '$FOLDER' not found."
+  exit 1
+fi
+
+# Recursively find and scrub metadata from all image files
+find "$FOLDER" -type f \( -iname "*.jpg" -o -iname "*.jpeg" -o -iname "*.png" -o -iname "*.gif" -o -iname "*.tiff" -o -iname "*.bmp" \) -exec exiftool -overwrite_original -all= {} \;
+
+echo "✅ Metadata removed from all images in '$FOLDER'."
+