Use git-cliff for automated changelog generation

[orhun]

Changelog is the reflection of the commits in the repo so we can simply use https://git-cliff.org

[orhun]

@raphamorim do you have a preferred format other than the one used in changelog.md?

Possible options:

1:

## What's Changed
* update CHANGELOG by @raphamorim
* feat(tabs): add command for closing all tabs except the current one by @orhun in [#614](https://github.com/raphamorim/rio/pull/614)
* add windows search key bindings and update docs by @raphamorim

2 (https://keepachangelog.com):

### Added
- Add command for closing all tabs except the current one by @orhun in [#614](https://github.com/raphamorim/rio/pull/614)

### Changed
- Update version on docs by @raphamorim
- Update by @github-actions[bot] in [#609](https://github.com/raphamorim/rio/pull/609)

### Fixed
- Enable search as default on Linux by @orhun in [#612](https://github.com/raphamorim/rio/pull/612)
- Fix lint by @raphamorim

3:

### Features 🔥
- Add command for closing all tabs except the current one by @orhun in [#614](https://github.com/raphamorim/rio/pull/614)

### Documentation 📚
- Update version on docs by @raphamorim
- Update by @github-actions[bot] in [#609](https://github.com/raphamorim/rio/pull/609)

### Bug Fixes 🐛
- Enable search as default on Linux by @orhun in [#612](https://github.com/raphamorim/rio/pull/612)
- Fix lint by @raphamorim

Also, there will be a section for new contributors for both of these formats, e.g.:

## New Contributors
* @fabricionaweb made their first contribution in [#218](https://github.com/raphamorim/rio/pull/218)
* @marrcelo made their first contribution in [#210](https://github.com/raphamorim/rio/pull/210)
* @dvtkrlbs made their first contribution in [#209](https://github.com/raphamorim/rio/pull/209)
* @pqppq made their first contribution in [#199](https://github.com/raphamorim/rio/pull/199)

[raphamorim]

2nd one looks great 🆗