Detect extensions installed in code-server and offer to install them

[ntimo]

Problem

Currently when using the vscode remote connect tool, VSCode does not share the extensions with code-server, this means users have to keep both tools in sync, which produces overhead.

Desired solution

The extensions installed on code-server in the workspace should be detected and automatically be installed when using VSCode Remotely with the extension.

[kylecarbs]

This can actually be fixed with documentation!

code-server --extensions-dir ~/.vscode-server/extensions

[jsjoeio]

@ntimo would love your input on #32

[ntimo]

@ntimo would love your input on #32

I know I am a bit late to the party, but I love the docs 👍

[jsjoeio]

Better late than never! Glad to hear it 😄