added shell.nix

shell.nix

@@ -0,0 +1,22 @@
+{pkgs ? import <nixpkgs> {}}:
+pkgs.mkShell {
+  buildInputs = [
+    pkgs.python313
+    pkgs.python313Packages.pip
+    pkgs.ninja # Add ninja here
+    pkgs.python313Packages.yt-dlp
+    pkgs.python313Packages.numpy
+    pkgs.python313Packages.tqdm
+    pkgs.python313Packages.img2pdf
+    pkgs.python313Packages.opencv-python
+    pkgs.ffmpeg
+    # Add any other development tools you need
+  ];
+
+  # If you're managing Python dependencies more explicitly with Nix
+  # python3Env = pkgs.python3.withPackages (p: with p; [
+  #   numpy
+  #   img2pdf
+  #   # ... other python packages
+  # ]);
+}