feat: add basic devcontainer support

[jeluard]

Motivation

Ease setup for environment supporting devcontainer.
e.g. allows MacOS users to easily develop with vscode under linux via docker or remote via ssh. Also improves the Codespaces experience.

[codecov]

Codecov Report

Merging #6667 (efed3e1) into unstable (ae984f0) will not change coverage.
Report is 6 commits behind head on unstable.
The diff coverage is n/a.

❗ Current head efed3e1 differs from pull request most recent head 63de26e. Consider uploading reports for the commit 63de26e to get more accurate results

Additional details and impacted files

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  Files           556      556           
  Lines         59050    59050           
  Branches       1898     1898           
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  Hits          36502    36502           
  Misses        22505    22505           
  Partials         43       43           

[wemeetagain]

LGTM

Have you tried using this?

[nflaig]

I haven't tested devcontainers myself but is this VS code specific and requires an extension? Might be worth to document how to use this in contribution docs

[jeluard]

@wemeetagain yes it does work fine, you can test it in codespaces directly from my fork. Great for PR review!

@nflaig good point, need some docs

[wemeetagain]

🎉 This PR is included in v1.18.0 🎉