Dev containers - removed (context + related issues)

[yamcodes]

This issue tracks the implementation of "dev containers" in the codebase.

For now, since the team is not using dev containers, the feature has been removed.
I created this issue as an archive to track the changes of this feature in case we ever decide to bring it back up.

Related: PRs

#71 - PR that attempts to bring devcontainers over the finish line (tackles #56, #60)

Related issues

Bugs: #55, #60
Tasks: #49, #56

[yamcodes]

Closing as "removed". In case we revive it - this is the starting point