Include completion file in Linux packages

[proletarius101]

Is your feature request related to a problem? Please describe. It is inconvenient and ineffective that the completion file needs to be manually placed by the users. So far, netbird only exposes a completion file generator provided by cobra at netbird completion [zsh].

Describe the solution you'd like During the packaging process, generate a completion file, such that the completions are loaded as soon as the package is installed into the OS. Examples:

• https://github.com/goreleaser/goreleaser/blob/main/scripts/completions.sh
• https://github.com/goreleaser/goreleaser/blob/5c15e5a6ef4079e98a8ddafc71a5606fe236db82/.goreleaser.yaml#L7
• https://carlosbecker.com/posts/golang-completions-cobra/

[mlsmaycon]

Thanks for the suggestion @proletarius101, we will include it when updating the cobra package version in the next releases.