Support/generate shell completions for fig

[baronfel]

Is your feature request related to a problem? Please describe.

Rider and other tools use the fig definitions for CLI tools to power their enhanced autocompletions in a shell-agnostic way, These definitions are per-tool and currently can drift with new features/additions to the CLI.

Describe the solution you'd like

We should implement a generator/exporter for the fig format for the dotnet tools and work with the maintainers to create a process for updates.

[KalleOlaviNiemitalo]

Will documentation of the fig format be available after Amazon shuts down fig in September 2024?

[baronfel]

My understanding is yes - the auto complete format will be kept and will power Amazon Q all-up. This format also powers Jetbrains enhanced terminal support.