creates a git branch like: `username/year/branch-name` where branch can be passed a space separated branch name

branch.sh

function branch() {
  local branch_name
  if [[ $# -eq 0 ]]; then
    echo "Usage: branch <name>"
    return 1
  fi
  if [[ $1 =~ [^a-zA-Z0-9._-] ]]; then
    echo "Invalid branch name: $1"
    return 1
  fi
  branch_name="$(id -un)/$(date +%Y)/${*:1}"
  branch_name=${branch_name// /-}  # Replace spaces with dashes
  if git rev-parse --verify "$branch_name" >/dev/null 2>&1; then
    echo "Branch '$branch_name' already exists"
    return 1
  fi
  git checkout -b "$branch_name"
}