language server start

compiler/NubLang.LSP/HoverHandler.cs

@@ -8,11 +8,21 @@ internal class HoverHandler : HoverHandlerBase
 {
     protected override HoverRegistrationOptions CreateRegistrationOptions(HoverCapability capability, ClientCapabilities clientCapabilities)
     {
-        throw new NotImplementedException();
+        return new HoverRegistrationOptions
+        {
+            DocumentSelector = TextDocumentSelector.ForLanguage("nub-lang")
+        };
     }
 
-    public override Task<Hover?> Handle(HoverParams request, CancellationToken cancellationToken)
+    public override async Task<Hover?> Handle(HoverParams request, CancellationToken cancellationToken)
     {
-        throw new NotImplementedException();
+        return new Hover
+        {
+            Contents = new MarkedStringsOrMarkupContent(new MarkupContent
+            {
+                Value = "# uwu",
+                Kind = MarkupKind.Markdown,
+            })
+        };
     }
 }