Add support for links in diagnostics

[dbaeumer]

VS Code added API to support links in diagnostics. We should investigate if we adopt this in LSP.

[razzeee]

I'm currently showing urls via diagnostics, they are just not linked.

[KamasamaK]

Relevant VS Code issue is microsoft/vscode#11847

[dvandra]

Is there any further updates on this feature-request?

[razzeee]

I think the current state is it being proposed via microsoft/vscode-languageserver-node@fa9ccc4

https://github.com/microsoft/vscode-languageserver-node#3160-next1-protocol-510-next1-json-rpc-620-next1-client-and-620-next1-server

[dbaeumer]

This got implemented and is documented in the 3.16 spec.