Support Flutter App development

[mdabir1203]

Depends on [add a reference link here]

• Open a PR
• Create a release
• Update templates (if necessary)
• Update [Tracking] Image support, deprecation / EOL dates #90
• Update Microsoft Artifact Registry docs

[samruddhikhandale]

Hi 👋

We appreciate your request for a new image support, however, the devcontainers/images repo only accepts improvements and bug fixes for the current set of maintained Images. Hence, we don't have any plans for adding support for new images.

@mdabir1203 Have you looked at the "flutter" Feature contributed by the community? See https://containers.dev/features.

We can keep this issue open to gather interest from the community, and reiterate our decision in needed. Thanks!