Remove underline from signature. Fix companion kind name

Author: pikinier20

scaladoc/resources/dotty_res/styles/theme/layout/content.css

@@ -250,6 +250,10 @@
   border-radius: 4px;
 }
 
+#content .main-signature a {
+  text-decoration: none;
+}
+
 #content>div>* {
   margin-bottom: 24px;
 }

scaladoc/src/dotty/tools/scaladoc/renderers/MemberRenderer.scala

@@ -67,8 +67,8 @@ class MemberRenderer(signatureRenderer: SignatureRenderer)(using DocContext) ext
       list("Example:", d.example)
     )
 
-  def companion(m: Member): Seq[AppliedTag] = m.companion.fold(Nil){ (_, dri) =>
-    val kindName = if m.kind == Kind.Object then "class" else "object"
+  def companion(m: Member): Seq[AppliedTag] = m.companion.fold(Nil){ (kind, dri) =>
+    val kindName = kind.name
     tableRow("Companion:", signatureRenderer.renderLink(kindName, dri))
   }