[x] Use enabled-settings in the server to turn on/off calls to language-services (there are internal dependencies between methods there, for instance links, so it needs to be handled close to the edge).
[x] Regression test with out-of-the-box experience in VS Code.
[x] Test the recommended all in approach in VS Code.
[x] Smoketest in Helix.
[x] Smoketest in Sublime.
[x] Release notes, migration instructions for settings.
Fixes #236
TODO
language-services(there are internal dependencies between methods there, for instance links, so it needs to be handled close to the edge).