feat: new action waiting progress

[jooola]

This replaces the 2 previous actions progress display with a single consistent one, that leverage the new hcloud.ActionWaiter functions.

The progress features have been extracted in a dedicated ui package to split the actions waiting and the progress concerns.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 39.51220% with 124 lines in your changes are missing coverage. Please review.

Project coverage is 59.55%. Comparing base (2cd08b2) to head (3cfd745).

Files	Patch %	Lines
internal/ui/progress_terminal.go	0.00%	29 Missing :warning:
internal/state/zz_command_helper_mock.go	0.00%	8 Missing :warning:
internal/cmd/server/shutdown.go	61.11%	4 Missing and 3 partials :warning:
internal/state/actions.go	78.57%	5 Missing and 1 partial :warning:
internal/ui/progress.go	40.00%	2 Missing and 4 partials :warning:
internal/ui/progress_script.go	89.65%	2 Missing and 1 partial :warning:
internal/cmd/server/create.go	0.00%	0 Missing and 2 partials :warning:
internal/cmd/base/set_rdns.go	0.00%	1 Missing :warning:
internal/cmd/certificate/create.go	0.00%	0 Missing and 1 partial :warning:
internal/cmd/firewall/add_rule.go	0.00%	0 Missing and 1 partial :warning:
... and 60 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #749      +/-   ##
==========================================
- Coverage   60.27%   59.55%   -0.73%     
==========================================
  Files         180      191      +11     
  Lines        6568     6770     +202     
==========================================
+ Hits         3959     4032      +73     
- Misses       1989     2115     +126     
- Partials      620      623       +3     

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[phm07]

Looks good! I don't know about the purple text though, maybe something subtle like dark gray would be better. I see that you created a "fake" action for hcloud server shutdown --wait, it doesn't show any message for me though in my testing.

[jooola]

[jooola]