Move non-Nix bash scripts

modules/home-manager/cli/bin/scripts/git-bare-clone

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# Creates a new bare clone of a repository with the bare files within a `.bare`
+# directory. It also sets the origin URL so push and pull work as expected.
+
+if [[ "$1" == "" ]]; then
+  echo "Usage: ${0##*/} <repository> [<directory>]"
+  exit 2
+fi
+
+set -euo pipefail
+
+repository_url="${1}"
+directory="${2:-}"
+location=".bare"
+
+# If no destination directory is specified, get it from the repository URL - the same as "git clone".
+if [ -z "${directory}" ]; then
+  directory="$(basename -s .git "${repository_url}")"
+fi
+
+# Create the parent directory if needed.
+mkdir -pv "${directory}"
+cd "${directory}"
+
+git clone --bare "${repository_url}" "${location}"
+
+# Adjust origin fetch locations.
+cd "${location}"
+git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
+
+# Set .git file contents.
+cd ..
+echo "gitdir: ./${location}" > .git