Release notes for v0.108.0

Please add your new features and breaking changes to the release notes
by opening PRs against the `release-notes-v0.108.0` branch.
## TODO
- [ ] PRs that need to land before the release, e.g. [deprecations] or [removals]
- [ ] add the full changelog
- [ ] categorize each PR
- [ ] write all the sections and complete all the `TODO`s
[deprecations]: https://github.com/nushell/nushell/labels/deprecation
[removals]: https://github.com/nushell/nushell/pulls?q=is%3Apr+is%3Aopen+label%3Aremoval-after-deprecation

Author: Bahex