Ignoro

Added
- Project information in `pyproject.toml`.

Added
- Template block headers in `.gitignore` files generated by Ignoro.
- Installation instructions in `README.md`.
- Development instructions in `README.md`.

Changed
- Improved template parsing and error handling.
- Tests fixtures simplified and test readability improved.
- Refactored and improved help messages for all commands.
- Fixed mistakes command descriptions in `README.md`.

Deprecated
- `show` command renamed to `list`.
- `list` command renamed to `search`.

Added
- Command to remove templates from a `.gitignore` file generated by Ignoro.
- Instructions on how to use the remove command in `README.md`.

Changed
- Improve `.gitignore` parsing and error handling.

Added
- Command to add templates to a `.gitignore` file generated by Ignoro.
- Instructions on how to use the add command in `README.md`.

Added
- Command to show templates included in a `.gitignore` file generated by Ignoro.
- Instructions on how to use the show command in `README.md`.

Changed
- List and create command help descriptions.

_Initial release_

Added
- Command to create a `.gitignore` file based on templates from [gitignore.io](https://www.toptal.com/developers/gitignore).
- command to list and search available templates from [gitignore.io](https://www.toptal.com/developers/gitignore).
- Instructions on how to use the create and list commands in `README.md`.