Proposal: feat(gitpod-cli): Enable completion command and unhide it

[axonasif]

Description

Glad I stumbled upon the codebase, I was literally about to write the completion scripts for use with my fish shell. It's kind of funny how this wasn't mentioned anywhere but it was already there for bash 😬 gp CLI got lots of subcommands and options, having tab-completion is super helpful, always missed it.

Related Issue(s)

Fixes #

How to test

1. Open a workspace in preview env
2. Type gp and hit Tab key.

• To check for other shells, just switch to them by fish or zsh
• And redo 2.

Release Notes

Tab-completions of `gp` CLI is now auto installed for bash, fish and zsh

Documentation

• Have to document as well

Werft options:

• /werft with-local-preview
  If enabled this will build install/preview
• /werft with-preview
• /werft with-integration-tests=all
  Valid options are all, workspace, webapp, ide

[axonasif]

/werft run

👍 started the job as gitpod-build-axon-gp-completion.2
(with .werft/ from main)

[axonasif]

/werft run

👍 started the job as gitpod-build-axon-gp-completion.3
(with .werft/ from main)

[werft-gitpod-dev-com]

started the job as gitpod-build-axon-gp-completion.4 because the annotations in the pull request description changed
(with .werft/ from main)

[axonasif]

/werft run

👍 started the job as gitpod-build-axon-gp-completion.6
(with .werft/ from main)

[axonasif]

/werft run with-clean-slate-deployment

👍 started the job as gitpod-build-axon-gp-completion.7
(with .werft/ from main)