mars: add hermes CLI shell alias

darman's own podman is rootless while the container runs under root's
(system) podman, so plain `podman exec` couldn't see it. Alias runs it
with sudo against the right socket.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Du1WQRk1F8DenrPhf8TofF

home/common.nix

@@ -0,0 +1,17 @@
+# Shared home-manager profile for darman, applied on every host via
+# common.nix. Host-specific extras (terra's desktop/dev tooling) layer on
+# top via their own home-manager.users.darman.imports entry, same pattern
+# used here — see hosts/terra/configuration.nix + hosts/terra/home.nix.
+{ ... }:
+{
+  home.stateVersion = "26.05";
+  programs.home-manager.enable = true;
+
+  # Matches terra's baseline (compinit, deduped/shared history, HISTFILE
+  # under $HOME). home-manager owns ~/.zshrc + ~/.zshenv as real files, which
+  # also means zsh's built-in zsh-newuser-install wizard never fires on
+  # first interactive login (it only triggers when none of
+  # .zshenv/.zprofile/.zshrc/.zlogin exist) — that used to happen on every
+  # host except terra.
+  programs.zsh.enable = true;
+}