Add option to disable hover documentation

[bitboxx]

The hover api documentation are often useless as they can be long (while shown on a small hover pop-up window) and in the way of error / warning messages that are more relevant.

This pop-up window is meant for a short contextual information, rather than a full API documentation.

No doubt some people like this feature, but please add an option to disable the documentation hover. I've tried toggling on/off the Rust Analyzer hover settings, nothing worked.

[lf-]

The diagnostics buried under stuff is a long-standing bug in VSCode, unfortunately :/
microsoft/vscode#73120