Instater

- `command`: Support pipes between two commands

- Better support `when` argument so that undefined variables are
counted as a falsey variable

- `aur`: Fix bug negating the condition for using `yay` vs `makepkg`

- Add `--version` option to the CLI to display the Instater version
- `aur`: Now an alias of `pacman`, which supports `makepkg`
- `pacman`: Add `aur` and `become` attributes
- `pacman`: Add support for `makepkg` and `yay` installations

- `user`: Support `create_home` argument

- **BREAKING** Use absolute path for the `instater_dir` variable
- Add duration logging for each task and in the overall summary
- Fix tag rendering to support `{{ item }}` in tags
- Add a `filename` jinja filter to extract filenames without extensions
- Document all tasks
- `aur`/`pacman`: Support checking for package group installation
- **BREAKING** `debug`: Remove the `msg` argument(pass the debug message
directly to `debug`)
- **BREAKING** `get_url`: Remove task as it is identical to `copy`