Auto indentation rules

[kalvinpearce]

C# indentation rules are missing from this extention so action based formatting will not work, see example below.

This has been brought up in a couple of other language extentions (python, c++) and is a little niche but would be really cool to get this working in this extention as some other extentions rely on this method for formatting e.g. VSCode/Vim

Steps to reproduce

Map a key to editor.action.reindentselectedlines
Put cursor inside a function on a line with an incorrectly line like this

Execute the key/action for editor.action.reindentselectedlines

Expected behavior

The line should be formatted and indented correctly inside the function like this

Actual behavior

The line remains in the same place as VSCode does not know the correctly indenting rules for the language