Improve readme to include experimental features

[jabraham17]

Improve readme to include experimental features

[ShreyasKhandekar]

Thanks for Updating this Jade!
In terms of experimental features I had a small comment about adding a part to tell users how to opt in. I think for the short term this is okay as is.

In the longer term I believe we should not have experimental features published to users for the stable release, rather we should use the VS Code Marketplace's ability to have a Beta/pre-release version of the extension to allow users who are interested to opt in to these features, till they are stable enough for the stable release.

[jabraham17]

In the longer term I believe we should not have experimental features published to users for the stable release, rather we should use the VS Code Marketplace's ability to have a Beta/pre-release version of the extension to allow users who are interested to opt in to these features, till they are stable enough for the stable release.

While to some extent I agree with that, its not within the control of the extension for when these features are available. The "experimental features" are fully baked language server features, its just that the dyno resolver needs to be more feature complete before these are on by default

[ShreyasKhandekar]

Okay I see, I was misunderstanding the experimental nature of the features. I think we can keep them this way in that case.