gitwatch package - possible lacking of gnugrep and gnused dependencies

[roomcays]

As I have described on discourse thread:

1. I have installed this packages system-wide on NixOS stable 24.11
2. when using gitwatch program from interactive shell it worked fine
3. I have then tried to put in under control of user-spaced systemd service unit to make it start automatically; this however could not happen due to errors:

Dec 31 22:34:50 hosthost gitwatch[3688627]: /nix/store/vabiazsm1vk3mcjhfx7cq31p211icx7s-gitwatch/bin/.gitwatch-wrapped: line 225: sed: command not found
Dec 31 22:34:50 hosthost gitwatch[3688629]: /nix/store/vabiazsm1vk3mcjhfx7cq31p211icx7s-gitwatch/bin/.gitwatch-wrapped: line 273: grep: command not found

Things done

I have blindly added gnused and gnugrep to the package.nix script, but I have not tested it because I don't know how to do it in the "easy way" (I have tried cloning the nixpkgs repo though, but I have failed upon system update).

[nix-owners]

The PR's base branch is set to master, but 3798 commits from the release-24.11 branch are included. Make sure you know the right base branch for your changes, then:

• If the changes should go to the release-24.11 branch, change the base branch to release-24.11
• If the changes should go to the master branch, rebase your PR onto the merge base with the master branch:

  # git rebase --onto $(git merge-base upstream/master HEAD) $(git merge-base upstream/release-24.11 HEAD)
  git rebase --onto 1d95cb5fa7a38717172e090d54338ca8daef8a86 edf04b75c13c2ac0e54df5ec5c543e300f76f1c9
  git push --force-with-lease

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/i-think-i-found-a-bug-in-gitwatch-package-but-i-dont-know-how-to-verify-and-possibly-fix-it/58167/3

[aucub]

Please base on the master branch. After the PR is merged, the bot can create the PR of backport 24.11.