feat(preview): docker container providers

[jyecusch]

Enables specifying a provider in a stack file as a docker container image.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 315 lines in your changes are missing coverage. Please review.

Project coverage is 1.39%. Comparing base (d8e9882) to head (0fb47cd).

Files	Patch %	Lines
pkg/provider/standard.go	0.00%	126 Missing :warning:
pkg/provider/image.go	0.00%	112 Missing :warning:
pkg/view/tui/commands/stack/down/stack_down.go	0.00%	28 Missing :warning:
pkg/view/tui/commands/stack/up/stack_up.go	0.00%	28 Missing :warning:
pkg/provider/provider.go	0.00%	20 Missing :warning:
pkg/project/project.go	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #722 +/- ## ======================================== - Coverage 1.42% 1.39% -0.04% ======================================== Files 73 74 +1 Lines 7498 7686 +188 ======================================== Hits 107 107 - Misses 7383 7571 +188 Partials 8 8 ``` | [Flag](https://app.codecov.io/gh/nitrictech/cli/pull/722/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/nitrictech/cli/pull/722/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech) | `1.39% <0.00%> (-0.04%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nitrictech#carryforward-flags-in-the-pull-request-comment) to find out more.

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[nitric-bot]

:tada: This PR is included in version 1.39.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: