feat: init nix flake

nix/devshell.nix

@@ -0,0 +1,52 @@
+{
+  self',
+  pkgs,
+}:
+let
+  colorshell = self'.packages.colorshell;
+
+  packages = [
+  ];
+
+  devPackages = with pkgs; [
+    nodePackages.nodejs
+    pnpm
+
+    # dev scripts
+    jq
+
+    # pywal16
+    pywal16
+    imagemagick
+  ];
+
+  colorshellDeps = pkgs.stdenvNoCC.mkDerivation {
+    inherit (colorshell.pnpmDeps) name src;
+    inherit (colorshell) pnpmDeps sourceRoot;
+
+    buildInputs = [ colorshell.npmConfigHook ];
+    installPhase = ''
+      mkdir -p $out/lib
+      cp -rp node_modules $out/lib/node_modules
+    '';
+  };
+in
+{
+  default = pkgs.mkShell {
+    inputsFrom = [ colorshell ];
+    packages = devPackages ++ packages;
+
+    shellHook = ''
+      NODE_MODULES_PATH="${colorshellDeps}/lib/node_modules"
+      if [ -L ./node_modules ] || [ -e ./node_modules ]; then
+        rm -rf ./node_modules
+      fi
+      echo "Linking $NODE_MODULES_PATH" to $PWD/node_modules...
+      ln -s $NODE_MODULES_PATH .
+    '';
+
+    passthru = {
+      inherit colorshellDeps;
+    };
+  };
+}