Inform 7 extension for VS Code

This extension adds support for Inform 7 in VS Code.

Features

The extension adds syntax highlighting to Inform 7 source (.ni file extension) and extensions (.i7x file extension).

It is recommended to also download the Inform 6 extension, so that Inform 6 inclusions in Inform 7 source are coloured.

Additionally, texts used in Vorple's execute JavaScript command phrase will have JavaScript highlighting. In other situations, if we want to specify that a text contains a JavaScript command, we can precede it by the comment [js]:

The JS instruction is a text that varies.
The JS instruction is [js]"window.alert('Hello!')".

This is useful for texts that varies or properties.

The extension also colour Preform (.preform file extension), but this is likely only of interest to those writing language extensions for Inform 7. Since the syntax for including Inform 6 and Preform in Inform 7 is the same ((- and -)), we should, similarly than for JS commands, add the comment [preform] right before the opening parenthesis, so that Preform is highlighted correctly.

Not doing this may cause the colouring of the inclusion to leak outside of the parentheses. (This may be a temporary solution, if something better is found in the future.)