Some misc changes.
- Moved old patch files to a `legacy` sub-folder
- If a legacy patch is used, show a warning and pause for 10 seconds
- Updated the checkout and Dockerfile so both use the same way of
cloning the Bitwarden/client repo
- Updated the `patch_web_vault.sh` script to try and detect the vault version
- Added two new make commands to prepare and release a new version
- Added a `.env` feature for the `Makefile` to set some defaults
Mainly used for using either `docker` or `podman` and for the GitHub
Release script to have a predefined GPG user/key
