Refactor todos-add, remove todos-edit

modules/home-manager/cli/scripts/default.nix

@@ -10,6 +10,7 @@
         "move-firefox-screenshots"
         "setbg"
         "tag-release"
+        "todos-add"
         "unmounter"
         "update-all-git-repos"
       ];

modules/home-manager/cli/scripts/todos-add.nix

@@ -0,0 +1,21 @@
+{ pkgs }:
+
+pkgs.writeShellApplication {
+  name = "todos-add";
+
+  runtimeInputs = with pkgs; [ coreutils ];
+
+  text = ''
+    TODOS_PATH="$HOME/Documents/wiki/todo.txt"
+
+    if [ ''${#} -eq 0 ]; then
+      if [ -p "/dev/stdin" ]; then
+        (cat; printf "\n\n") >> "''${TODOS_PATH}"
+      else
+        eval "''${TODOS_EDITOR}" "''${TODOS_PATH}"
+      fi
+    else
+      printf "%s\n\n" "''${*}" >> "''${TODOS_PATH}"
+    fi
+  '';
+}