[proposal] Support for container name option in devcontainer.json

For ease of identification, we have a case to name the container at runtime.
It is helpful if there is an option like container_name as in docker-compose.

---

Current:

```jsonc
{
"name": "some-name-here", // This is not used for container name
"runArgs": ["--name", "${localWorkspaceFolderBasename}"], // Use WS basename for example
...
}
```

Proposed:

```jsonc
{
"name": "some-name-here",
"container_name: "${localWorkspaceFolderBasename}", // Field name comes from docker-compose
...
}