Switch to chat model and increase context lenght

Introduce Manual Confirm (#3)

* Add question crate to prompt user for commit message

This commit adds the question crate to prompt the user for a commit message.

The question crate is used to ask the user if they want to commit the message
that was generated by the OpenAI API.

The user can choose to commit the message or abort the commit.

* Add a dry-run flag to the CLI

This commit adds a dry-run flag to the CLI. This flag will allow the user to
see what the commit message would be without actually committing the changes.

* Add a spinner to the CLI

This is a nice addition to the CLI.

It makes the CLI more fun to use.

* Overshadow variable

Co-authored-by: Miguel Piedrafita <[email protected]>

Remove git2 dependency

The git2 dependency was only used to check if the current directory was a git
repository. This can be done using the `git` command line tool instead.

chore: update release workflow

- Remove version from binary name
- Add install script

Add release workflow

This workflow will build the binaries for the release and upload them to the
release.