Worktree prompt for azd .env copy

azd_prompt.txt

When starting a new session, detect whether the checkout is a Git worktree and wire up `.azure`:

1. Get paths:
   - `git rev-parse --git-common-dir`
   - `git rev-parse --git-dir`
   - `git rev-parse --show-toplevel`

2. If `--git-dir` contains `/worktrees/`, treat it as a worktree checkout.

3. In that case, check for a shared `.azure` in the common repo:
   - `COMMON_DIR=$(git rev-parse --git-common-dir)`
   - `COMMON_AZURE="$COMMON_DIR/../.azure"` (equivalent to `<main repo>/.azure`)
   - If `COMMON_AZURE` exists, create a symlink at `<worktree root>/.azure` pointing to it.

4. Do not overwrite a real existing `.azure` directory in the worktree.

Or just directly run this script:
TOP=$(git rev-parse --show-toplevel) && GD=$(git rev-parse --git-dir) && CD=$(git rev-parse --git-common-dir) && \
if [[ "$GD" == *"/worktrees/"* ]]; then CA="$(cd "$CD/.." && pwd)/.azure"; \
  if [ -d "$CA" ] && [ ! -e "$TOP/.azure" ]; then ln -s "$CA" "$TOP/.azure"; fi; fi