add 'shell.nix' to Scripts

with the power of nix package manager, this file provides information
about required packages for building and running the project. a nix
shell can be started by navigating into Scripts forlder and running `nix-shell`

Author: ichinii

Scripts/shell.nix

@@ -0,0 +1,55 @@
+/*
+ *
+ */
+
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+
+    # dev tools
+    python3
+    clang # for clang-format
+
+    # build tools
+    pkg-config
+    gcc
+    gdb
+    cmake
+    ninja
+
+    # rayx-core dependencies
+    boost
+    hdf5
+
+    # rayx-ui dependencies
+    glslang
+    vulkan-headers
+    vulkan-loader
+    vulkan-validation-layers
+    vulkan-tools
+    vulkan-tools-lunarg
+    vulkan-utility-libraries
+
+    # SDL dependencies
+    xorg.libX11
+    xorg.libXext
+    xorg.libXrandr
+    xorg.libXcursor
+    xorg.libXi
+    xorg.libXinerama
+    xorg.libXScrnSaver
+    libxkbcommon
+    wayland
+    libdrm
+    mesa
+    alsa-lib
+    dbus
+    libudev-zero
+  ];
+
+  shellHook = ''
+    export CMAKE_PREFIX_PATH=${pkgs.boost}:${pkgs.hdf5}:${pkgs.cmake}:${pkgs.pkg-config};
+    export VK_LAYER_PATH="${pkgs.vulkan-validation-layers}/share/vulkan/explicit_layer.d";
+  '';
+}