Added devenv and moved config files

modules/dev/devenv.nix

@@ -0,0 +1,26 @@
+# Custom package to quickly set up development environments for different
+# programing languages
+
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.samfelag.modules.dev.devenv;
+in
+{
+  options.samfelag.modules.dev.devenv = {
+    enable = lib.mkEnableOption "devenv";
+  };
+  config = lib.mkIf cfg.enable {
+
+    hm.xdg.dataFile."devenv/devenv.sh".source = ../../data/devenv/devenv.sh;
+    hm.xdg.dataFile."devenv/templates".source = ../../data/devenv/templates;
+
+    hm.programs.zsh.shellAliases = {
+      devenv = "source $HOME/.local/share/devenv/devenv.sh";
+    };
+
+    # - Requirements -----------------------------
+    samfelag.modules.dev.direnv.enable = true;
+
+  };
+}