templates: add various shell templates I commonly use

templates/go-fyne-shell/.envrc

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+use nix

templates/go-fyne-shell/shell.nix

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+{ pkgs ? import <nixpkgs> { } }:
+pkgs.mkShell {
+  shellHook = ''
+    export NO_COLOR=true
+    export PS1="\u@\h:\w; "
+  '';
+
+  nativeBuildInputs = with pkgs.buildPackages; [
+    alsa-lib
+    glfw
+    go
+    libxkbcommon
+    pkg-config
+    wayland
+    xorg.libXcursor
+    xorg.libXi
+    xorg.libXinerama
+    xorg.libXrandr
+    xorg.libXxf86vm
+    xorg.xinput
+  ];
+}

templates/shell/.envrc

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+use_nix

templates/shell/shell.nix

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+{ pkgs ? import <nixpkgs> { } }:
+pkgs.mkShell {
+  shellHook = ''
+    PS1='\u@\h:\w; '
+  '';
+  buildInputs = with pkgs; [
+  ];
+}