Instead of downloading the server distro, install the standalone CLI

What's missing in the CLI:

• bring back code serve-local
• new parameter --download-folder to pass a folder that contains already downloaded server distros archives. The resolver will try to pre-download the distros on the client to avoid download issues on the WSL distro side.
• more structured progress reporting in the CLI: download and unpackage percentage

Optional:
Use the CLI as proxy to connect to a server port, replacing the current proxy solution

• resolver starts code serve. Server is downloaded and started on some port or socket path on the WSL side.
• resolver starts a local proxy server and returns that address as the resolver result. E.g. localhost:3456
• VS Code makes a connection to that local address.
• The local proxy calls the cli on the WSL side wsl -e /somepath/code --connect-local and uses stdin/out to proxy the requests
• wsl -e /somepath/code --connect-local connects to the server stated by code serve.