Ignoro

Fixed
- Make search term matches bold and underlined.
- Make autocomplete only match the beginning of template name.

Added
- Autocomplete for the `create`, `search`, `show`, `add`, and `remove` commands.
- Version flag to to show the current version of Ignoro.

Updated
- Invalid reading and writing cli error messages.

Fixed
- Add missing instructions to the Development section of `README.md`.

Added
- Command to show a template from [gitignore.io](https://www.toptal.com/developers/gitignore).
- Instructions on how to use the show command in `README.md`.

Changed
- Lint and refactor api and cli tests.

Added
- Project information in `pyproject.toml`.